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  • What is the best MTA setup for a home/laptop computer (*not* server)?

    - by thomasrutter
    Hello, What is a good MTA (e.g. Postfix or something else) setup for a home computer behind a NAT, or a laptop that is not always online? I've read a lot of Postfix tutorials on how to set it up this way or that, but they are usually geared towards computers that are servers ie they have a static IP have a domain name are always connected to the same network My requirements are, I guess: Ability to redirect mail for local users to another server of my choosing. No listening for incoming SMTP connections - outgoing only Ability to route outgoing mail via an external SMTP server with authentication (and perhaps encryption) If not Postfix, I need an MTA which can queue up mails in case it temporarily has no internet connection.

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  • Properly Hosting Multiple Sites on VDS

    - by Aristotle
    I'm going to be moving about 7-10 websites (5-8 with Databases - MySQL) onto our new Virtual Private Server. I'm curious what the best way to host many sites on a single server is though. Do I create a directory for each site immediately within my root directory, and then point the domain names for each site to http://123.123.123.123/siteDirectory - or is there a more appropriate way to do this? I'm very interested in maintining control over how many concurent connections each site can have at any given time - would I be able to do that on the directory-level, or am I required to limit the concurrent-connections to the VPS itself?

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  • rebuild yum index on aws s3

    - by Chucks
    I am trying to rebuild yum repo on aws S3 after adding new packages. Here are few commands I am trying, but it is not helping. [root@chucks ~]$ createrepo --baseurl http://rpmcopy.xxxxx.com.s3-website-us-east-1.amazonaws.com /repodata/ --update Saving Primary metadata Saving file lists metadata Saving other metadata Generating sqlite DBs Sqlite DBs complete How do I give a path from S3? /repodata/ path is not relevent I believe. All my pkgs are under bucket s3://rpmcopy.xxxxx.com/. And repodata dir is under s3://rpmcopy.xxxxx.com/repodata

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  • How do I make XTerm not use bold?

    - by mike
    I like using XTerm, I like its default "fixed" font, and I like using terminal colors rather than having a monochromatic terminal. However, XTerm seems to insist on using a bold version of the font whenever it's displaying a bright color: I hate hate hate the bold version of the font, but I like the brightness. The man page seems to suggest that adding "XTerm.VT100.boldMode:false" to my ~/.Xresources would disable this "feature", but it doesn't seem to have any effect. I've had it in there for months, so it's not a rebooting issue. How can I force XTerm to always use the standard, non-bold version of the fixed font, even when it's displaying bright text? Edit: Some have suggested putting "XTerm*boldMode: false" in my ~/.Xresources. That didn't help either. I've confirmed that the changes have taken effect with xrdb, though: $ xrdb -query | grep boldMode XTerm*boldMode: false And if i run xprop and click an xterm, I get "WM_CLASS(STRING) = "xterm", "XTerm"" .. so i'm definitely running real xterms. BTW, this is just a plain-vanilla Ubuntu Intrepid box. If anyone else here is running the same, can you try running: echo -e '#\e[1m#' ...and let me know whether the # on the right has a black pixel in the middle like the one on the left does?

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  • Ubuntu 10.04 install - frozen at splash, no errors

    - by Andrew Bolster
    Has anyone else come across this? After about as much of a fresh install as i can muster without buying new drives, and after walking through the amd64 alternate install with ease, and after a little 'pre-splash' screen where the orange dots under the (very sexy) new ubuntu logo blink away, I'm left with a vista of purple hues and logo plonked in the middle, with the dots not going anywhere. I was at this same position last night at 3 in the morning, left it lying overnight, and nothing had changed, so I'm pretty sure its frozen, but when i go in and inspect /var/log/* in the recovery console, no errors, no complaints, no problems. I'm at my wits end and am just about ready to try anything. If this was on SO I'd be bountying, but if anyone can help you'll just have to cope with my thanks! Additional Details on my blog and my first attempt at asking for help

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  • netstat -ntap doesn't show pid/process name for some connections?

    - by depesz
    I have ubuntu/hardy server, with kernel 2.6.24-23-server and netstat: # netstat --version net-tools 1.60 netstat 1.42 (2001-04-15) The problem is that we have a lot of ESTABLISHED connections that don't show PID nor Program name in netstat -ntap output. Netstat was called from root, there are no chroots, grsecurity, nor anything like this (or so I was told :). Any idea on what might be wrong? UPDATE lsof -n -i works ok, and shows pid/process name for the connections.

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  • Single application through OpenVPN tunnel (Debian Lenny)

    - by mikael
    I'm using Debian Lenny and I want to tunnel rtorrent only through a OpenVPN tunnel. I have a tunnel running, the config file looks like this: client dev tun proto udp remote openvpn.xxx.com 1194 resolv-retry infinite nobind persist-key persist-tun ca /etc/openvpn/xxx/keys/ca.crt cert /etc/openvpn/xxx/keys/client.crt key /etc/openvpn/xxx/keys/client.key tls-auth /etc/openvpn/xxx/keys/tls.key 1 ns-cert-type server comp-lzo verb 3 auth-user-pass script-security 3 reneg-sec 0 My idea is that I could run a sockd proxy internally that redirects traffic to the openvpn tunnel. I could use the *nix "proxifier" application "tsocks" to make it possible for rtorrent to connect through that proxy (as rtorrent doesn't support proxies). I have trouble configuring sockd as my IP inside the VPN changes every time I connect. This is a config file someone said would help: http://ircpimps.org/sockd.conf As my IP changes at each connect I don't know what to put in that config file. I have no control over the host side config file. Any help wanted. Any other method is very welcome.

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  • Help setting up NSD daemon (DNS server)

    - by Catalin
    While searching for a secure dns server I came across the NSD project. I was really impressed by what seemed to me the best option out there that's open source. One problem thought their 'tutorial' is really not beginner friendly. I have basic DNS knoledge but what's in there is out of my league. I need to have multiple sites on this CentOS server I've recently got my hands on. They also need to receive email. Details: I have a master host and would love to set this in the way described in the rows that follow: masterhost.com -> ns1.masterhost.com mail.masterhost.com www.masterhost.com addonhost.com -> ns1.masterhost.com mail.masterhost.com www.addonhost.com And so on. Any help in setting up this DNS server please? All answers and suggestions are welcomed. Thank you in advance.

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  • bash : "set -e" and check if a user exists make script exit

    - by Dahmad Boutfounast
    i am writing a script to install a program with bash, i want to exit on error so i added "set -e" in the beginning of my script. the problem is that i have to check if a user exists inside of my script, to do this i am using "grep "^${USER}:" /etc/passwd", if the user exists, the script runs normally, but if the user doesn't exist, this command exists, and i don't want to exit on this case (i have to create the user and continue my installation). so what's the solution to make my script continue running ?? i tried to redirect the output of "grep" to a variable, but i still have the same problem :( thanks.

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  • Why isn't "(ulimit -d 1000; firefox) &" working?

    - by MaxB
    I'm trying to limit the memory usage of firefox to prevent it from stalling the whole system with problematic web sites. I tried, in bash: (ulimit -d 1000; firefox) & This should limit the memory usage to 1000kB. Then I opened YouTube, and noticed, in top, that firefox is using 2.6% of the memory, or about 200MB, and not crashing. Clearly the limit is being ignored. Why is that, and how can I enforce it correctly?

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  • What is the kernel module "hid_microsoft"?

    - by Masi
    The lsmod-command shows the odd module. The command "modprobe -a hid_microsoft" does not reveal anything. What is it? $ modinfo hid_microsoft filename: /lib/modules/2.6.28-15-generic/kernel/drivers/hid/hid-microsoft.ko license: GPL srcversion: 3FE2E2F2EE89174E885204A alias: hid:b0005v0000045Ep00000701 alias: hid:b0003v0000045Ep0000009D alias: hid:b0003v0000045Ep00000713 alias: hid:b0003v0000045Ep000000F9 alias: hid:b0003v0000045Ep000000DB alias: hid:b0003v0000045Ep0000003B depends: vermagic: 2.6.28-15-generic SMP mod_unload modversions 586

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  • Screen -X exec commands not working until manually attached

    - by James Watt
    I have a batch script that starts a java server application inside of a screen. The command looks like this: cd /dir/ && screen -A -m -d -S javascreen java -Xms640M -Xmx1024M -jar javaserverapp.jar nogui After I run the batch script, it starts the server and puts it inside the correct screen. If I list my screens after, I see something like this: user@gtwy /dir $ screen -list There is a screen on: 16180.javascreen (Detached) 1 Socket in /var/run/screen/S-user. However, I have a second batch script that sends automated commands to this server and runs on a different crontab interval. Because of the way the application works, I send commands to it like this (this command tells it to alert connected users "testing 123"): screen -X exec .\!\! echo say testing 123 I've also tried: screen -R -X exec .\!\! echo say testing 123 screen -S javascreen -X exec .\!\! echo say testing 123 Unfortunately, these commands DO NOT WORK. They don't even give me an error message, they just do nothing. HOWEVER - If I manually attach to the screen first (with the below command) and then detach, now I can run any of the above commands flawlessly. I can demonstrate this with a video, if I wasn't clear enough here. screen -r -d Thanks in advance. Update: here is the important parts of /etc/screenrc. It should be totally vanilla, I've never edited this file. # VARIABLES # =============================================================== # No annoying audible bell, using "visual bell" # vbell on # default: off # vbell_msg " -- Bell,Bell!! -- " # default: "Wuff,Wuff!!" # Automatically detach on hangup. autodetach on # default: on # Don't display the copyright page startup_message off # default: on # Uses nethack-style messages # nethack on # default: off # Affects the copying of text regions crlf off # default: off # Enable/disable multiuser mode. Standard screen operation is singleuser. # In multiuser mode the commands acladd, aclchg, aclgrp and acldel can be used # to enable (and disable) other user accessing this screen session. # Requires suid-root. multiuser off # Change default scrollback value for new windows defscrollback 1000 # default: 100 # Define the time that all windows monitored for silence should # wait before displaying a message. Default 30 seconds. silencewait 15 # default: 30 # bufferfile: The file to use for commands # "readbuf" ('<') and "writebuf" ('>'): bufferfile $HOME/.screen_exchange # # hardcopydir: The directory which contains all hardcopies. # hardcopydir ~/.hardcopy # hardcopydir ~/.screen # # shell: Default process started in screen's windows. # Makes it possible to use a different shell inside screen # than is set as the default login shell. # If begins with a '-' character, the shell will be started as a login shell. # shell zsh # shell bash # shell ksh shell -$SHELL # shellaka '> |tcsh' # shelltitle '$ |bash' # emulate .logout message pow_detach_msg "Screen session of \$LOGNAME \$:cr:\$:nl:ended." # caption always " %w --- %c:%s" # caption always "%3n %t%? @%u%?%? [%h]%?%=%c" # advertise hardstatus support to $TERMCAP # termcapinfo * '' 'hs:ts=\E_:fs=\E\\:ds=\E_\E\\' # set every new windows hardstatus line to somenthing descriptive # defhstatus "screen: ^En (^Et)" # don't kill window after the process died # zombie "^["

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  • Ubuntu 10.04 install - frozen at splash, no errors

    - by Andrew Bolster
    Has anyone else come across this? After about as much of a fresh install as i can muster without buying new drives, and after walking through the amd64 alternate install with ease, and after a little 'pre-splash' screen where the orange dots under the (very sexy) new ubuntu logo blink away, I'm left with a vista of purple hues and logo plonked in the middle, with the dots not going anywhere. I was at this same position last night at 3 in the morning, left it lying overnight, and nothing had changed, so I'm pretty sure its frozen, the virtual terminals are not accessible, ie, c+a+F1 etc does nothing, but when i go in and inspect /var/log/* in the recovery console by booting off the installation cd, no errors, no complaints, no problems. I'm at my wits end and am just about ready to try anything. If this was on SO I'd be bountying, but if anyone can help you'll just have to cope with my thanks! Additional Details on my blog and my first attempt at asking for help Update: I can reasonably say it is not a hardware fault, as a full install of 9.10 with dual screen nvidia xinemara indicate that nothing is wonky

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  • gray dotted box outlining desktop icons on windows 7

    - by Max
    I occasionally get this problem where for some reason small, dotted gray boxes appear around my desktop icons. It always goes away after I restart, but I'm just curious what it is. I don't know of anything in particular I do to cause it, but it only outlines icons I click, and it only does it to one icon at a time. The picture below is the box on the recycle bin. IF I click a different icon it'll happen to that one instead. I'm using windows 7. Thank you.

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  • View all users in a specific group in CentOS

    - by slayernoah
    I added a user user01 to a group group01 using: usermod -a -G group01 user01 When I run in command id user01 it shows that this user has actually been added to the group. However, the file /etc/group doesn't reflect this. i.e. I believe that on this file, users that belong to each of the groups should be listed next to it. Please correct me if I am wrong. This is a fresh installation of CentOS 6.4 Also, since id user01 shows that this is updated, is there any way to check all the members of group group01?

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  • Rip authedicatation from LDAP to Local

    - by oxinabox
    We are taking a small portion of out network offline, and running a separate network using that portion. (By small portion I mean 2 servers, that will be connected to 30 odd boxs that aren't usually part of our network, and don't need to authenicate) I intend to create a VM on one of the servers to provide general user services, and IRC server, remote shell etc. And I would like the users to be able to use there usual server log in details. Problem is the LDAP server that normally checks those details is not one of the severs. So I need to be able to some how take their details off LDAP and put them on the the server that is coming. One suggestion I had was to set a LDAP server on the VM locally, and clone the LDAP database onto it (using something called slapcat) is this the best way? Or can I I change the LDAP data into local authentication data?

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  • ssh-keygen works for root only?

    - by Hulk
    Does ssh-keygen -t rsa work if only set for root user i.e, if the username on local system is sodium and i generate the key using the above said command and on the remote system if i place the key in /root/.ssh authorized_keys ,this works. But on the remote system if the key is placed in /home/natrium/.ssh authorized_keys This still prompts for a password.Is this the expected behavior or is that some thing wrong in the above procedure Thanks..

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  • Apache + Tomcat error 120006 Using mod_proxy_ajp for Load Balance

    - by Wakaru44
    I have an apache 2 frontend with two nodes, and a backend with two instances of tomcat 6 balance with mod_proxy_ajp. The bbdd is in a separate machine. All machines use RHEL, 6.2 on the frontend, 5.5 on the backend. The infraestructure is virtualized using VMware. # This is the apache config in one of the virtualHost. ProxyPreserveHost On ProxyPass / balancer://liferay/ <Proxy balancer://liferay> BalancerMember ajp://lrab:8009 route=liferaya BalancerMember ajp://lrbb:8009 route=liferayb status=+H ProxySet lbmethod=byrequests nofailover=on </Proxy> The conector in tomcat is now configured like this: <!-- Define an AJP 1.3 Connector on port 8009 --> <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" URIEncoding="UTF-8" enableLookups="false" allowTrace="true" /> Do you think it could be useful to set a maxThreads parameter, like in this post?? in that case, How can i determine a proper number of threads? From time to time, we get errors like this [Tue Sep 18 17:57:02 2012] [error] ajp_read_header: ajp_ilink_receive failed [Tue Sep 18 17:57:02 2012] [error] (120006)APR does not understand this error code: proxy: read response failed from 192.168.1.104:8009 (lrab) And apache switches to the pasive node (if its active) or fails with 503. Some things i have tried so far: I think that i have some performance issues with one of the applications, Here you can see a threadDump But i'm not quite sure about it. I also started to monitor the network connection. I have noticed that there are some pings lost when i have a "ping -f " so maybe it could be a network issue, but the success rate is 100% (so the lost packets are only a few among the flood, but maybe, i don't know, enough to break the link betwen apache and tomcat). I wrote a python script to check connectivity with timestamps on the pings, so i can know when the network fails. After sniffing the network , i can also see some RST packets, but i don't know if that is a normal behaviour (some applications do that to end a network communication). I have also noticed that the applications have problems communicating with the database, but im not even sure if this could be related or not. If you think so, i can post more info about it. I changed the connector on the tomcats to use the native one, but still the same. I need not even a solution to this, but maybe some guidance on how can i troubleshoot this better ¿Analyze threads, monitor mysql performance, sniff the traffic between apaches and tomcats? Ultimately, all i need is to balance the tomcat instances in Active/pasive mode, so if there is another way to do it, i could give it a try.

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  • X11 tunnelling through SSH from Fedora 3 server to Windows Vista client fails to work.

    - by MiffTheFox
    Okay, I've tried using Xming and PuTTY, as well as Cygwin/X and Cygwin ssh, and it is not working. I've been able to run X applications locally, so it's not a client-side X problem. I've connected to the server using ssh -X user@server and ended up with this: local-user@client: ~$ ssh -X user@server user@server's password: Last login: Sun Jul 19 15:26:46 2009 from 192.168.100.147 [user@server ~]$ xclock & [1] 27770 [user@server ~]$ Error: Can't open display: localhost:10.0 [1]+ Exit 1 xclock [user@server ~]$ [user@server ~]$ Here's the relevant snippet of my sshd_config #AllowTcpForwarding yes #GatewayPorts no #X11Forwarding no X11Forwarding yes X11DisplayOffset 10 X11UseLocalhost yes I can't seem to find ssh_config on the client-side. /etc/ssh doesn't exist.

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  • Restrict SSH user to connection from one machine

    - by Jonathan
    During set-up of a home server (running Kubuntu 10.04), I created an admin user for performing administrative tasks that may require an unmounted home. This user has a home directory on the root partition of the box. The machine has an internet-facing SSH server, and I have restricted the set of users that can connect via SSH, but I would like to restrict it further by making admin only accessible from my laptop (or perhaps only from the local 192.168.1.0/24 range). I currently have only an AllowGroups ssh-users with myself and admin as members of the ssh-users group. What I want is something that works like you may expect this setup to work (but it doesn't): $ groups jonathan ... ssh-users $ groups admin ... ssh-restricted-users $ cat /etc/ssh/sshd_config ... AllowGroups ssh-users [email protected].* ... Is there a way to do this? I have also tried this, but it did not work (admin could still log in remotely): AllowUsers [email protected].* * AllowGroups ssh-users with admin a member of ssh-users. I would also be fine with only allowing admin to log in with a key, and disallowing password logins, but I could find no general setting for sshd; there is a setting that requires root logins to use a key, but not for general users.

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