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• KeePass lost password and/or corruption due to Dropbox/KeePassX

  - by GummiV

  I started using Keepass about a month ago to hold my passwords and online accounts info. Everything was stored in a single .kdb file, only protected with a password. I'm using Windows 7. Now Keepass can't open my .kdb file with the error "Invalid/wrong key". I'm fairly confident I have the right password. Altough I might have mixed up a few letters I've tried about two dozen different combinations to minimize that possibility - but can't rule it out though. My guess is however that the .kdb file got corrupted, either due to Dropbox syncing (only using it on one computer though) or because I edited the file using KeePassX on Ubuntu (dual boot on the same computer, accessing a mounted Win7 NTFS partition), or possibly a combination of both. I have tried restoring older versions(even the original one) from Dropbox and trying out all possible passwords without any luck. (which does seem to rule out KeePassX as the culprit, since oldest copies are before I edited the file from Ubuntu) I have tried opening the file with the "Repair KeePass Database file" which always gives the "0xA Invalid/corrupt file structure" (the same error for when a wrong password is typed). I was wondering if there was any way for me to salvage my hard-gathered data. I know generally that brute force cracking is not feasible, but since I can remember probably more than half of the usernames/passwords, any maybe the fact that one of them does come up fairly often (my go-to pass for trivial stuff), that might simplify the brute force process to a doable time frame. Maybe the brute-force thing might incorporate the fact that I know the password length and what characters it's made from. (If we assume corruption, not a password-blackout on my part) I could do some programming if there are any libraries or routines that I could use. Other people seem to have had a similar probem http://forums.dropbox.com/topic.php?id=6199 http://forums.dropbox.com/topic.php?id=9139 http://www.keepassx.org/forum/viewtopic.php?t=1967&f=1 So hopefully this question will become a suitible resource for people when searching the web. Feel free to tell me if you think this should rather be a community wiki.

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• Configuring wsgi for a simple Python based site

  - by jbbarnes

  I have an Ubuntu 10.04 server that already has apache and wsgi working. I also have a python script that works just fine using the make_server command: if __name__ == '__main__': from wsgiref.simple_server import make_server srv = make_server('', 8080, display_status) srv.serve_forever() Now I would like to have the page always active without having to run the script manually. I looked at what Moin is doing. I found these lines in apache2.conf: WSGIScriptAlias /wiki /usr/local/share/moin/moin.wsgi WSGIDaemonProcess moin user=www-data group=www-data processes=5 threads=10 maximum-requests=1000 umask=0007 WSGIProcessGroup moin And moin.wsgi is as listed: import sys, os sys.path.insert(0, '/usr/local/share/moin') from MoinMoin.web.serving import make_application application = make_application(shared=True) QUESTION: Can I create a similar section in apache2.conf pointing to another wsgi file? Like this: WSGIScriptAlias /status /mypath/status.wsgi WSGIDaemonProcess status user=www-data group=www-data processes=5 threads=10 maximum-requests=1000 umask=0007 WSGIProcessGroup status And if so, what is required to convert my simple_server script into a daemonized process? Most of the information I find about wsgi is related to using it with frameworks like Django. I haven't found a simple howto detailing how to make this work. Thanks.

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• Live Screencast under Linux

  - by OmnipotentEntity

  I was having some difficulty with running a Live Screencast under Linux. I've found jtvlc and tried using that, but whenever I use it the stream comes out either blank or lagged with extremely high latency. I have a fast internet connection and a fast computer, but am I perhaps taxing it too much? Any ideas on what I could possibly be doing wrong? # 1. Get an account on http://www.justin.tv/ # 2. Copy streaming key from: http://www.justin.tv/broadcast/adv_other # 2. Install VLC: http://www.videolan.org/vlc/ # 3. Get Win/Mac/Lin Stream Client: \ # http://apiwiki.justin.tv/mediawiki/index.php/Linux_Broadcasting_API # 4. Adjust the vlc parameters to your liking and run VLC like this #!/bin/bash cvlc screen:// --input-slave=pulse:// \ --screen-width 1920 \ --screen-height 1080 \ --screen-fps 5 \ -v input_stream \ --sout='#duplicate{ dst="transcode{ scale=1, venc=x264{ keyint=60 }, vcodec=h264, vb=600, acodec=mp4a, ab=32, channels=2, samplerate=22050 } :rtp{dst=127.0.0.1,port=1234,sdp=file:///tmp/vlc.sdp} "}' \ --sout-transcode-threads=4 & sleep 2 # 5. Run JTVLC to stream like this: ./jtvlc/jtvlc omnipotententity censored /tmp/vlc.sdp # Notes: #- If you want to see what you're about to stream add 'dst=display, ' # before 'dst="transcode[' # More about the VLC parameters: http://wiki.videolan.org/Documentation:Modules/screen

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• OpenVZ with bridged interfaces and VLAN

  - by Deimosfr

  Hi, I've got a problem with OpenVZ with bridged VLAN. Here is my configuration: +------+ +-------+ +-----------+ +---------+ br0 |VE101 | | | | OpenBSD |----->| Debian |------->| | | WAN |--->| Router | | OpenVZ | +------+ | | | Firewall |----->| br0 br1 | br1 +------+ +-------+ +-----------+ +---------+------->|VE102 | |br0 | | |VLAN br0.110 +------+ v +---------+ |VE103.110| +---------+ I can't make VLAN work on br0 (br0.110) and I would like to understand why. I don't have any switch so no problem with unmanageable switch. I've configured a VLAN interface on OpenBSD in /etc/hostname.vlan110: inet 192.168.110.254 255.255.255.0 NONE vlan 110 vlandev sis1 And it seems to be working fine. I've also adapted my PF configuration to work with VLAN but I don't see any incoming traffic. On my Debian Lenny, here is my interfaces configuration : # The loopback network interface auto lo iface lo inet loopback # br0 auto br0 iface br0 inet static address 192.168.100.1 netmask 255.255.255.0 gateway 192.168.100.254 network 192.168.100.0 broadcast 192.168.100.255 bridge_ports eth0 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off # VLAN 110 auto br0.110 iface br0.110 inet static address 192.168.110.1 netmask 255.255.255.0 network 192.168.110.0 gateway 192.168.110.254 broadcast 192.168.110.255 pre-up vconfig add br0 110 post-down vconfig rem br0.110 It looks OK, but when I start my VE, here is the message: ... Configure veth devices: veth103.0 Adding interface veth103.0 to bridge br0.110 on CT0 for VE103 can't add veth103.0 to bridge br0.110: Operation not supported VE start in progress... So I've got one error here. I've followed this documentation http://wiki.openvz.org/VLAN but it doesn't work. I've certainly missed something but I don't know why. Someone could help me please? Thanks

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• Backup Exec tape rotation guidelines

  - by HannesFostie

  Hi We use Backup Exec to take care of our backups for our data server, exchange server, and one more set of systems. Each of these 3 is being done on a separate "set" of tapes. Our goal is to be able to roll back a full 2 weeks, with 1 full backup each weekend and differential/incremental backups in between (the difference between the two in our case isn't very big, because the employees mostly use a very similar set of files throughout the week). While playing around with the settings on how to achieve this, we set the time for BE to keep the full backup to 14 days, but because we have too much data this would require manual intervention each time to erase a certain tape and use that. What I would like to know is what kind of guidelines, tricks, tips and general "stuff to think about" you keep in mind when designing your backup schedule. The type of backups (full/diff/incr) isn't of that much importance in our case as it's more or less set in stone. Made this community wiki as it's not a very specific question. Thanks in advance!

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• Running Flash on a headless Solaris box

  - by Marty Pitt

  Our build server is a Solaris box, and I'm trying to run a suite of FlexUnit tests as part of the automated build process. This works by compiling a swf movie with a suite of automated unit tests. The build script launches this movie, which automatically begins running the tests. Results of each test are sent back to the launching script across a port, and written out to a local xml file. Once the tests are completed, the movie closes down, and the build script interrogates the results to see if all the tests passed. The FlexUnit wiki provides information about how to to acheive this on a Unix server, by using Xvnc to provide a virtual space for the flash movie to run its tests in. I've provided this information through to our sys admin team, (along with the link to the article), and I've been told that because this is a Solaris box, we can't use that approach - Xvnc isn't supported on Solaris. Unfortunately, I know very little about servers, *nix vs Solaris, or Xvnc. Can someone please provide some advice about how we can achieve the same outcome on a Solaris box?

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• Graphite not running

  - by River

  I'm currently trying to install graphite 0.9.9 on a gentoo box using these instructions from the graphite wiki. Essentially, it fronts graphite using apache and mod_wsgi. Everything seems to have gone well, except that apache / the graphite webapp never seem to return a response to the web browser (the browser continuously waits to load the page). I've turned on the graphite debug info, but the only message in the log files is this, repeated over and over again in info.log (with the pid always changing): Thu Feb 23 01:59:38 2012 :: graphite.wsgi - pid 4810 - reloading search index These instructions have worked for me before to set up graphite on an Ubuntu machine. I suspect that mod_wsgi is dying, but I have confirmed that mod_wsgi works fine when not serving the graphite webapp. This is what my graphite.conf vhost file looks like: WSGISocketPrefix /etc/httpd/wsgi/ <VirtualHost *:80> ServerName # Server name DocumentRoot "/opt/graphite/webapp" ErrorLog /opt/graphite/storage/log/webapp/error.log CustomLog /opt/graphite/storage/log/webapp/access.log common # I've found that an equal number of processes & threads tends # to show the best performance for Graphite (ymmv). WSGIDaemonProcess graphite processes=5 threads=5 display-name='%{GROUP}' inactivity-timeout=120 WSGIProcessGroup graphite WSGIApplicationGroup %{GLOBAL} WSGIImportScript /opt/graphite/conf/graphite.wsgi process-group=graphite application-group=%{GLOBAL} WSGIScriptAlias / /opt/graphite/conf/graphite.wsgi Alias /content/ /opt/graphite/webapp/content/ <Location "/content/"> SetHandler None </Location> # XXX In order for the django admin site media to work you # must change @DJANGO_ROOT@ to be the path to your django # installation, which is probably something like: # /usr/lib/python2.6/site-packages/django Alias /media/ "/usr/lib64/python2.6/site-packages/django/contrib/admin/media/" <Location "/media/"> SetHandler None </Location> # The graphite.wsgi file has to be accessible by apache. It won't # be visible to clients because of the DocumentRoot though. <Directory /opt/graphite/conf/> Order deny,allow Allow from all </Directory> </VirtualHost>

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• Nginx map module 301 redirecting

  - by Reinier Korth

  I've rebuild my website in Ruby on Rails and now I want to 301 redirect a lot of old urls using Nginx's http://wiki.nginx.org/HttpMapModule For some reason I can't get it to work. It works fine without the rewrite ^ $new permanent; line. Does anyone see what I'm missing? This my nginx.conf: server { server_name example.com; return 301 $scheme://www.example.com$request_uri; } # 301 redirect list map $uri $new { /test123 http://www.example.com/test123; /bla http://www.example.com/bladiebla; } server { server_name www.example.com; rewrite ^ $new permanent; root example/public; location ^~ /assets/ { gzip_static on; expires max; add_header Cache-Control public; } try_files $uri/index.html $uri @unicorn; location @unicorn { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://unicorn-<%= application %>; } error_page 500 502 503 504 /500.html; client_max_body_size 4G; keepalive_timeout 10; }

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• Upstart Script on Centos 6

  - by MarcusMaximus

  I'm trying to create an upstart script to run a python script on startup. In theory it looks simple enough but I just can't seem to get it to work. I'm using a skeleton script I found here and altered. description "Used to start python script as a service" author "Me <[email protected]>" # Stanzas # # Stanzas control when and how a process is started and stopped # See a list of stanzas here: http://upstart.ubuntu.com/wiki/Stanzas#respawn # When to start the service start on runlevel [2345] # When to stop the service stop on runlevel [016] # Automatically restart process if crashed respawn # Essentially lets upstart know the process will detach itself to the background expect fork # Start the process script exec su nonrootuser -c "python /usr/local/scripts/script.py" end script The test script I want it to run is currently a simple python script that runs without any issue when run from a terminal. #!/usr/bin/python2 import os, sys, time if __name__ == "__main__": for i in range (10000): message = "shotgunUpstartTest " , i , time.asctime() , " - Username: " , os.getenv("USERNAME") #print message time.sleep(60) out = open("/var/log/scripts/scriptlogfile", "a") print >> out, message out.close() The location/var/log/scripts has permissions 777 The file /usr/local/scripts/script.py has permissions 775 The upstart script /etc/init.d/pythonupstart.conf has permissions 755

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• Wireshark WPA 4-way handshake

  - by cYrus

  From this wiki page: WPA and WPA2 use keys derived from an EAPOL handshake to encrypt traffic. Unless all four handshake packets are present for the session you're trying to decrypt, Wireshark won't be able to decrypt the traffic. You can use the display filter eapol to locate EAPOL packets in your capture. I've noticed that the decryption works with (1, 2, 4) too, but not with (1, 2, 3). As far as I know the first two packets are enough, at least for what concern unicast traffic. Can someone please explain exactly how does Wireshark deal with that, in other words why does only the former sequence work, given that the fourth packet is just an acknowledgement? Also, is it guaranteed that the (1, 2, 4) will always work when (1, 2, 3, 4) works? Test case This is the gzipped handshake (1, 2, 4) and an ecrypted ARP packet (SSID: SSID, password: password) in base64 encoding: H4sICEarjU8AA2hhbmRzaGFrZS5jYXAAu3J400ImBhYGGPj/n4GhHkhfXNHr37KQgWEqAwQzMAgx 6HkAKbFWzgUMhxgZGDiYrjIwKGUqcW5g4Ldd3rcFQn5IXbWKGaiso4+RmSH+H0MngwLUZMarj4Rn S8vInf5yfO7mgrMyr9g/Jpa9XVbRdaxH58v1fO3vDCQDkCNv7mFgWMsAwXBHMoEceQ3kSMZbDFDn ITk1gBnJkeX/GDkRjmyccfus4BKl75HC2cnW1eXrjExNf66uYz+VGLl+snrF7j2EnHQy3JjDKPb9 3fOd9zT0TmofYZC4K8YQ8IkR6JaAT0zIJMjxtWaMmCEMdvwNnI5PYEYJYSTHM5EegqhggYbFhgsJ 9gJXy42PMx9JzYKEcFkcG0MJULYE2ZEGrZwHIMnASwc1GSw4mmH1JCCNQYEF7C7tjasVT+0/J3LP gie59HFL+5RDIdmZ8rGMEldN5s668eb/tp8vQ+7OrT9jPj/B7425QIGJI3Pft72dLxav8BefvcGU 7+kfABxJX+SjAgAA Decode with: $ base64 -d | gunzip > handshake.cap Run tshark to see if it correctly decrypt the ARP packet: $ tshark -r handshake.cap -o wlan.enable_decryption:TRUE -o wlan.wep_key1:wpa-pwd:password:SSID It should print: 1 0.000000 D-Link_a7:8e:b4 - HonHaiPr_22:09:b0 EAPOL Key 2 0.006997 HonHaiPr_22:09:b0 - D-Link_a7:8e:b4 EAPOL Key 3 0.038137 HonHaiPr_22:09:b0 - D-Link_a7:8e:b4 EAPOL Key 4 0.376050 ZyxelCom_68:3a:e4 - HonHaiPr_22:09:b0 ARP 192.168.1.1 is at 00:a0:c5:68:3a:e4

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• bind would not work unless allow-query is "any"

  - by adrianTNT

  I have this in /etc/named.conf, I commented the default values and set my own under it. My domain would not load in browser unless I set allow-query to "any", is this OK, what should I edit? If is localhost or 127.0.0.1; 10.0.1.0/24; domain would not load. I tried the 127.. thing because it mentioned it here: http://wiki.mandriva.com/en/Testing:Bind Bind version is 9.7.0-P2-RedHat-9.7.0-5.P2.el6_0.1 OS is CentOS 6.0. options { // listen-on port 53 { 127.0.0.1; }; listen-on port 53 { any; }; //listen-on-v6 port 53 { ::1; }; listen-on-v6 port 53 { any; }; directory "/var/named"; dump-file "/var/named/data/cache_dump.db"; statistics-file "/var/named/data/named_stats.txt"; memstatistics-file "/var/named/data/named_mem_stats.txt"; //allow-query { localhost; }; allow-query { any; }; recursion yes; dnssec-enable yes; dnssec-validation yes; dnssec-lookaside auto; /* Path to ISC DLV key */ bindkeys-file "/etc/named.iscdlv.key"; };

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• Run GUI application via cronjob in Ubuntu?

  - by Christoffer

  Hi, I have a remote server running "Ubuntu 10.04 Desktop". From it I want to run a script that walks through a list of websites and captures screenshots of them. The script is working and thoroughly tested. When I SSH to the server with ssh -X user@ip-adress I can run my script by calling ./myscript.py and everything will work OK. I then modifed my crontab file and added... 59 17 * * * env DISPLAY=:0 /path/to/myscript.py ...as recommended by the Ubuntu WIKI. I can see in the /var/log/syslog that my cron job is started, but it doesn't capture any screenshots. When running env DISPLAY=:0 /path/to/myscript.py from the shell I get No protocol specified myscript.py: cannot connect to X server :0 If I ssh to the server without the -X option I only get the second row of the error: myscript.py: cannot connect to X server :0 What can I try now? More details I have run xhost +local: and checked the output of xhost to see that the option was set correctly. If I run ls /tmp/.X11-unix/ the output is X0 The server only has one screen. Thank you in advance!

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• "Can't find root filesystem / error mounting /dev/root" when booting to new kernel

  - by salparadise

  I am trying to upgrade my kernel from 2.6.18-274 to 2.6.39 for some wireless card drivers. When I boot into the new kernel I get the "Can't find root filesystem / error mounting /dev/root" googling led me to this page http://fedoraproject.org/wiki/Common_kernel_problems#Can.27t_find_root_filesystem_.2F_error_mounting_.2Fdev.2Froot From what I am reading seems to be an issue with a driver for my SATA controller or HD, but I can't find what option I need to add to the kernel. Doing a diff from the old initrd to the new one gives me the following: root-> diff /tmp/kafter /tmp/kbefore 6a7,8 > lib/dm-message.ko > lib/dm-region_hash.ko 8a11 > lib/dm-raid45.ko 13d15 < lib/dm-region-hash.ko 16a19 > lib/dm-mem-cache.ko Do I need any of those? not sure if I would need dm-raid45.ko as I am not running a raid. I have the same SATA and IDE options configured for both kernels so not sure what else to look for, any help is appreciated. Additionally here is the HW info: 00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA Controller (rev 03) (prog-if 8f [Master SecP SecO PriP PriO]) Subsystem: Hewlett-Packard Company Unknown device 3006 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 233 I/O ports at 1818 [size=8] I/O ports at 1830 [size=4] I/O ports at 1820 [size=8] I/O ports at 1834 [size=4] I/O ports at 14f0 [size=16] Capabilities: [70] Power Management version 2 root-> smartctl -a /dev/sda ... === START OF INFORMATION SECTION === Device Model: WDC WD5000AADS-00S9B0

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• Choose a VPN software on CentOs 6.5

  - by loyCossou

  We are installing a SMS gateway with Kannel, on a CentOs 6.5 server, which is supposed to connect via SMPP to our local operators. Kannel is working fine and no probleme there. Now 2 operators are asking to connect via a VPN for obvious security reasons; actually they asked for or VPN details so they can connect to it... Now, I am looking for a free VPN that I can setup and configure on our server... I saw Open VPN that I already started configuring, no issue... But just saw on Wikipedia (http://en.wikipedia.org/wiki/OpenVPN#Platforms) that OpenVPN is not compatible with other VPN packages. Now my question is: 1- I am absolutely new to VPN technologies. Is OpenVPN a good choice in my situation? 2- If I configure OpenVPN on my server, will it be possible to any client to connect to my server? 3- Anyone have any advice for me? Thank you for this great community.

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• Freebsd jail for an small company - checklist - what shouldn't forget

  - by cajwine

  Looking for an checklist for an "small company freebsd/jail server". Having pretty common starting point: FreeBSD jail (remote/headless) for the company: public web, email, ftp server, and private (maybe in the future partially public) wiki (foswiki) 4 physical persons, (6 email addresses) + one admin - others will never use ssh) have already done usual hardening on the host side (like pf, sshguard etc). my major components are: dovecot, exim, apache22, proftpd, perl5.14. Looking for an checklist, what I shouldn't forget. My plan: openssl self-signed certificates for exim, dovecot and proftpd (wildcard keys) openssl self-signed certificate for apache (later will go for "trusted-signed" key) My questions are: is is an "good practice" having one pair of wildcard SSL-certificates for many programs? (exim, dovecot, proftpd) - or should I generate one key for each service? should I add all 4 persons as standard (unix) users, or I should go with virtual users? Asking because: have only small count of users, and it is more simple to configure everything (exim, dovecot) for local users ($HOME/Maildir), plus ability to set $HOME/.forward/vacation and etc. is here some (special) things what I should consider? (e.g. maybe, in the future we want setup our own webmail - will make this any difference?) any other recommendation? Thank you, hoping that this question fit into the http://serverfault.com/faq under the: Server and Business Workstation operating systems, hardware, software Operations, maintenance, and monitoring Looking for an checklist, but please explain why you're recommending it. See Good Subjective, Bad Subjective. related: What's your suggested mail server configuration for a FreeBSD server?

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• OpenVPN-based VPN server on same system it's "protecting": feasible?

  - by Johnny Utahh

  Scenario: hosted machine (typically a VPS) serving wiki, svn, git, forums, email lists (eg: GNU mailman), Bugzilla (etc) privately to < 20 people. People not on team not allowed access. Seeking VPN-restricted access to said server. Have good user experience with OpenVPN-based servers/clients, but have yet to server-admin such systems. Otherwise, experienced Linux sysadmin. Target system: Ubuntu, probably 12.04. Seeking to put an OpenVPN process on above server to "protect" all the above-mentioned services, enabling only OpenVPN-authorized clients/processes to access above services. (Can easily acquire additional IP address(es) as needed for this setup.) Option: if absolutely needed, can employ an additional, dedicated, "VPN server" VPS simply to be my VPN server "front end." But prefer to have all server processes (VPN server plus other server apps) all running on same machine, if possible. Will consider further if dedicated-VPN-machine setup enables 1. easier installation/administration, 2. better/easier end-user experience, and/or 3. makes system significantly more secure. Any of above feasible? The main intention: create a VPN from purely-hosted resources, and not spend all the effort to make a non-VPN, secure site--which typically means "SSL wrapping" + all the continual webserver-application-update management. Let the VPN server deal with access security, and spend list time pushing said security "down" in the other apps/Apache.

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• Strange sound behavior

  - by caarlos0

  First of all, sorry for the tittle. English isn't my native language, and I can't find a word to describe the strange behavior I'm getting here. In the most simple explanation, is like sound keeps going down and up again... Think in a kid with that old radios that have a circled volume button. Think like these kid keeps "turning" the volume button. That is the behavior I'm getting here. At first, I believed that it was a pulseaudio issue, but, it isn't. I followed the wiki part I think that should be my problem, but it didn't work. After that, as I'm using XFCE, I didn't really need pulseaudio, so I removed it and stays with a clean alsa, hopping that will fix my problem. Sweet mistake. It really looks like a kid looking for trouble. I believed it worked, and, suddenly, here is the same issue again. BTW: I have a full-upgraded testing system (yeah, I upgraded to testing hopping for new pulseaudio version which fix the issue), no pulseaudio at all, just xfce, started with startxfce. What can I do to fix this? It's extremely annoying... sometimes I just want to throw my laptop in the wall because of this. Any extra info you need, please, tell me. Thanks in advance -- EDIT: My alsamixer is like this: And here is a video with the sound behavior.

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• Bash shell prompt: where is $RET?

  - by Evgeni Sergeev

  I was reading this https://wiki.archlinux.org/index.php/Color_Bash_Prompt and ended up with the following: # Stores the status of each command in $RET PROMPT_COMMAND='RET=$?;' # A colour. RED_SHELL='\e[0;36m' # Prints "Status 1" if RET is 1, for example. RET_VISUALISE='$(if [[ $RET != 0 ]]; then echo -ne "Status \[$RED_SHELL\]$RET\n" && RET=0; fi;)' # What to print for each prompt. PS1="$RET_VISUALISE\[\e]0;\w\a\]\n\[\e[32m\]\u@\h \t \[\e[33m\]\w\[\e[0m\]\n\$ " This does almost what I want, except when I press Enter,Enter,Enter multiple times after a command that returned status != 0. In this case it prints "Status 1" every time I press Enter. This is what the && RET=0; part was supposed to get rid of. Also, I don't understand why env | grep RET only shows the PS1 contents. What is the scope of $RET ?

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• Installing Debian 7.1 on FakeRAID/Intel Z77 results in boot with no grub menu

  - by user198982

  I'm trying to install Debian 7.1 from DVD onto 2x500GB drives which are set up in a FakeRAID mirror using the on-board FakeRAID provided by the Z77 chipset. I have followed the guide here https://wiki.debian.org/DebianInstaller/SataRaid. Namely, I booted into the expert install with the 'dmraid=true' option added, installed onto the RAID mirror which the installer correctly detected, then installed grub2 onto /dev/mapper/.. raid volume. I chose to use LVM (so a boot partition + LVM volume). As per the guide, I have uncommented the "GRUB_DISABLE_LINUX_UUID=true" line in "/etc/default/grub" and ran "update-grub" then "grub-install /dev/mapper/.." (with the right RAID device in the command). However, after I rebooted the system, all I got was a grub console. It did not load the menu. I checked and it seems that it never even generated a menu file. I re-installed Debian a few times since, trying out different options and also a few workarounds people posted online, but to no avail. The best I am getting is a grub console. No menu. Some times it will generate the grub.cfg, some times it won't, depending on the workaround I try. I was wondering if anyone else has experienced this issue. There is no need to preach how I should not use FakeRAID. I have seen others trying to figure this out so I think a resolution to this issue would be of interest to more than just me. Also, I first installed the system onto a small drive for testing something else. I made a backup with Acronis and was able to restore that onto the RAID mirror by using Universal Restore. When I installed it onto a 500GB without RAID, backed up using the same method, then restored onto a RAID volume of the same size, it would not boot and I got grub errors. Weird. I can post more details, just let me know what you want to see.

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• A router that supports connecting with 2 different wifi networks

  - by Allan Deamon

  I Have the following setup in one place: We have a small local ISP through wireless. I have a external parabolic antenna, connected to a external usb wifi radio, connected through USB to a desktop old PC. The pc connects do the ISP wiki network, then do a Dial Up (PPPoE) connection through the this wifi setup. This will expand with others mobiles devices to be used. When I need, I take my home wireless router and connect though Ethernet in the PC, which is shares the internet. The problem is that the PC must be always ON and working. I would like to buy a wireless router which could be an AP to the mobile devices, notebooks, etc, as also could connect to the ISP Wifi/PPPoE network. So, this device must: Have one radio with detachable antenna to connect to the external antenna. It must connect as client to a network and then dial up the PPP Have another radio serving as AP (infrastructure) to the local place This can't be very expensive. I found a candidate: ( http://www.tp-link.com/en/products/details/?categoryid=1682&model=TL-WR2543ND ) It have 3 deatachable antennas, working with dual band. Officially, his firmware doesn't support it. My supposition: If internally there is 3 or 2 distinct wlan ports (like wlan0, wlan1), and there is support, i could use a OpenWRT, DD-WRT or Tomato to make this works. It also have 1 USB port, which I cold use to connect my actual USB Wifi card on it instead to the old PC. Another alternative, is a router that can do this out of box, with the original firmware. But I don't think this is a easy thing to find.

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• How can I boot from .iso images stored on the harddrive ?

  - by user29701

  I want to put a .iso file of a bootable linux CD on the harddrive of my computer. I want to have it boot using grub (or lilo), and have it boot from the .iso file as if the .iso was a real CD in the CDROM drive. Here is a page that makes reference to doing this, but instead of a .iso file it is a .img file of a floppy or a whole harddisk installation: http://grub4dos.sourceforge.net/wiki/index.php/Grub4dos%5Ftutorial That page makes reference to "cdrom emulation is not supported", but I don't know if it is not supported in grub, or if what want to do is completely impossible. Apparently Epidemic Linux (and maybe Knoppix ?) have a "bootfrom" parameter: "Using the parameter “bootfrom=/partition/path” you can start Epidemic from an ISO image located anywhere on the HD without having to create a DVD. This is very handy for testing the system." (From www.epidemiclinux.org/ ) Drew P.S. I am NOT interested in installing the CD on the harddrive. If I could have a dozen .iso's on the harddrive, I would like to be able to select them from grub and boot each of them.

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• How to have PHP and mod_wsgi python app on the same domain?

  - by Lazik

  I am using apache with mod_wsgi (python3) on ubuntu 12.04. I have a python app (bottle) which is at www.mysite.com/ In my python app I have routes like www.mysite.com/abbb?q=blab I would like a path www.mysite.com/forum to resolve to a php app (simple machine forums) Ideally I would like to use apache to handle the forum part and pass it to php (instead of coding it in the python app). Don't know if it's possible. I'm new to this, I have read https://code.google.com/p/modwsgi/wiki/ConfigurationGuidelines#The_Apache_Alias_Directive but I don't understand how to use it. Here is my apache conf for the mod_wsgi app, I don't know how to specify the PHP portion. <VirtualHost *:80> ServerName www.ex.com ServerAlias ex.com *.ex.com RewriteEngine On RewriteCond %{HTTP_HOST} !^www\. RewriteRule ^(.*)$ http://www.%{HTTP_HOST}$1 [R=301,L] WSGIDaemonProcess ex user=www-data group=www-data processes=1 threads=5 WSGIScriptAlias / /var/www/vhosts/ex/app.wsgi <Directory /var/www/vhosts/ex> WSGIProcessGroup ex WSGIApplicationGroup %{GLOBAL} Order deny,allow Allow from all </Directory> </VirtualHost>

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• Nginx flv audio pseudo stream works but video is not loading

  - by sarah

  I am working on a development server for a company & they want nginx webserver to work with. So the requirements for their company is, it should be capable of doing following things i.e hotlink protection, mp4 & flv pseudo stream & secure streaming. However nginx fulfills their requirements and i am configuring their server from past 2 days as i am new to this field so i've only acheived hotlinking prevention in past 2 days. But the problem on which i am stuck is flv pseudo streaming, to make work to mp4 pseudo stream it was just a piece of paper but i am really fuc*ed up with flv pseudo stream. I have converted my flv videos with flvmdi tools to insert many keyframes but the problem is , when i try to seek video from following keyframes that are generated by flvmdi i.e test.flv?start=2681223, video does not load but audio pseudo works fine. So it means no problem with my flv configuration in nginx.conf file. And the forum that i used to compile my nginx-1.2.1 is http://h264.code-shop.com/trac/wiki/Mod-H264-Streaming-Nginx-Version2 & by adding additional module --with-http_flv_module. This forum is really active, hopes i will resolve my problem as soon as you guys will provide me some guide.

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• Can not open ports in iptables on CentOS 5??

  - by abszero

  I am trying to open up ports in CentOS's firewall and am having a terrible go at it. I have followed the "HowTo" here: http://wiki.centos.org/HowTos/Network/IPTables as well as a few other places on the Net but I still can't get the bloody thing to work. Basically I wanted to get two things working: VNC and Apache over the internal network. The problem is that the firewall is blocking all attempts to connect to these services. Now if I issue service iptables stop and then try to access the server via VNC or hit the webserver everything works as expected. However the moment I turn iptables back on all of my access is blocked. Below is a truncated version of my iptables file as it appears in vi -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 5801 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 5901 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 6001 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 5900 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT Really I would just be happy if I could get port 80 opened up for Apache since I can do most stuff via putty but if I could figure out VNC as well that would be cool. As far as VNC goes there is just a single/user desktop that I am trying to connect to via: [ipaddress]:1 Any help would be greatly appreciated!

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• As an admin, what tools do you use to log what you do to your boxes?

  - by Jerry

  I am more of a linux applications developer than an admin. Over time, I've built servers and maintained them, sometimes to offer services, mostly just to develop the applications I work on. Way back when I would create a file in my account to keep notes on what I did on each machine, so that I could replicate that when I migrated to other machines. Nowadays, I install something a private trac installation, install it's blog plugin, and then use that to make notes of everything I install, and most commands that I run, as well as the output. This provides me a combination wiki and blog that I find very useful as a "captain's log". I do this mostly so that when I migrate to a new clean machine, I have a much easier time in bringing it up. And yet, I am always amazed when I see others just install this, delete that, run this, setup this config, ... without seeming to use any way to actually note what they are doing. What do YOU do, and what tools are available? I am especially interested in the transition between maintaining a few machines for a few people and maintaining several to dozens of machines providing a real service. What are the best practices, and where can I find good resources? Thanks!

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