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• Permission denied but group permissions look good on redhat

  - by Tony

  I have a user ftpadmin: -bash-3.2$ id ftpadmin uid=10001(ftpadmin) gid=2525(fsg) groups=2525(fsg),10005(git) The important group to note is "git" Then I have my git repository: ls -al drwxrwxr-x 7 git git 4096 Apr 20 14:17 fsg So ftpadmin is a member of git, and git has given all permissions to people in the group. Why do I see this when I login as ftpadmin: -bash-3.2$ ls -al /home/git/ ls: /home/git/fsg: Permission denied ... Seems like I should have permission...

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• How to filter Varnish logs based on XID?

  - by Martijn Heemels

  I'm running into infrequent 503 errors which appear hard to pinpoint. Varnishlog is driving me mad, since I can't seem to get the information I want out of it. I'd like to see both the client- and backend-communications as seen by Varnish. I thought the XID number, which is logged on Varnish's default error page, would allow me to filter the exact request out of the logging buffer. However, no combination of varnishlog parameters gives me the output I need. The following only shows the client-side communication: varnishlog -d -c -m ReqStart:1427305652 while this only shows the resulting backend communication: varnishlog -d -b -m TxHeader:1427305652 Is there a one-liner to show the entire request?

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• SSMTP to forward root@localhost mail

  - by Redconnection

  I would like to forward mail that gets sent root@localhost on multiple servers to our company admin account (e-mail is hosted on gmail) I have installed ssmtp on centos 5.5 via yum and configured it. i've also changed the last line in /etc/aliases to reflect where mail to root should go to. I've then tried sending mail to root - this gets delivered without a problem (mail -v root) I've also tried sending mail to root@localhost - this is not delivered to the specified gmail account.

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• How to set the laptop screen brightness programatically?

  - by zls

  I'm currently migrating to openbox without gnome session. In unity i can use the vendor keys to set the screen brightness, but in openbox I'm on my own. /sys/class/backlight/acpi_video0/brightness works fine, the problem is that I need sudo to set the brightness and that wouldn't work with keyboard mappings. xbacklight -get/set doesn't do or output anything. I don't really want to use xrandr --brightness. Are there any other options or a way to fix the problems with xbacklight or acpi_video0 ?

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• cannot find java even though it is there (ubuntu 12.04)

  - by Jeff Storey

  I'm trying to just execute the java command and it's saying it cannot be found, even though it is there. Here's what my output looks like root@oneiric:/usr/lib/jvm/default-java/bin# ls -al java -rwxrwxrwx 1 uucp 143 5750 2012-09-20 11:14 java root@oneiric:/usr/lib/jvm/default-java/bin# ./java -su: ./java: No such file or directory So the ls shows it's there, but it doesn't seem to execute. Can someone explain why this is?

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• Encoding with FFmpeg using a FIFO

  - by Ashot Martirosyan

  Hello everyone. I'm trying to convert Flac audio file to AAC file using command line. So I wrote this ffmpeg -i input.flac temp.wav faac -q 120 -o output.m4a temp.wav It's working fine. Now I want to do the same using fifo, so I'm writing this mkfifo temp.wav ffmpeg -i input.flac temp.wav & faac -q 120 -o output.m4a temp.wav And it's freezing. So could you tall me what I'm doing wrong. Thanks a lot, and sorry for my English.

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• Separated virtual networks with same subnet range with 2 interface

  - by Coolpet

  I'm having some problems with routing with the following: I have a server with 2 interfaces. It has 1-1 alias contains the same subnet. the 2 interface is connected to 2 switch, which are separated from each other. Infrastructure: Eth0 192.168.16.2/20 Eth0:eth0 192.168.1.222/20 Eth1 192.168.32.3/20 Eth1:eth1 192.168.1.223/20 I have a PC which has the IP address: 192.168.1.3/24 The problem is the next: If PC is on subnet 1, I can ping it. If PC is on subnet 2, I can't ping it. traceroute shows the route is across 192.168.1.222 ping -I 192.168.1.223 192.168.1.3 is not working on subnet 2. arp entries show the MAC address belonging to the correct interface (eth1 on subnet 2) How can I force the server to look on both interface same ranged subnet for specific IP? It searches only in the first subnet. The routing table has these 2 entries: 192.168.0.0/20 dev eth0 proto kernel scope link src 192.168.1.222 192.168.0.0/20 dev eth1 proto kernel scope link src 192.168.1.223

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• How to back up initial state of external backup drive?

  - by intuited

  I've picked up an HP Simplesave external drive. It comes with some fancy software that is of no use to me because I don't use Windows. Like many current consumer-targeted backup drives, the backup software is actually contained on the drive itself. I'd like to save the drive's initial state so that I can restore it if I decide to sell it. The backup box itself is somewhat customized: in addition to the hard drive device, it presents a CDROM-like device on /dev/sr0. I gather that the purpose of this cdrom device is to bootstrap via Windows autoplay the backup application which lives on the disk itself. I wouldn't suppose any guarantees about how it does this, so it seems important to preserve the exact state of the disk. The drive is formatted with a single 500GB NTFS partition. My initial thought was to use dd to dump the disk (/dev/sdb) itself, but this proved impractical, as the resulting file was not sparse. This seemed to be because the NTFS empty space is not filled with zeroes, but with a repeating series of 16 bytes. I tried gzipping the output of dd. This reduced to the file to a manageable size — the first 18GB was compressed to 81MB, versus 47MB to tarball the contents of the mounted filesystem — but it was very slow on my admittedly somewhat derelict Pentium M processor. The time to do that first 18GB was about 30 minutes. So I've resorted to dumping the disk state and partition data separately. I've dumped the partition state with sfdisk -d /dev/sdb > sfdisk.-d.out I've also created a compressed image of the NTFS partition (the only one on the disk) with ntfsclone --save-image --output - /dev/sdb1 | gzip -c > ntfsclone.img.gz Is there anything else I should do to ensure that I can restore the precise original state of the drive?

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• DNS caching server config problem

  - by Alex

  I have a Bind DNS caching-only server setup that is working. I am bringing up a new AD domain controller that will also be a DNS server for that AD but I don't want it responding to any DNS queries except those that are AD related. So, my goal is to leave this caching server as the primary DNS server for stations on the network and have it forward requests for the AD domain to the domain controller. My understanding is that I just need a forward zone for that domain pointing to the domain controller. However it does not seem to be working. So that leaves me to think that my caching server is not forwarding properly. For example, this AD is going to have a naming convention of hostname.mydomain.local. If I do an nslookup and specify the domain controller's IP address as the server, I can query addresses that exist in DNS on that server, such as dc1.mydomain.local. However, queries to my caching server times out (I get a response from the caching server if I query mydomain.local but none of the objects in that domain). Any suggestions? Here is my named.conf file: options { directory "/var/named"; listen-on { 192.168.0.14; 127.0.0.1; }; forwarders { ; ; }; forward first; }; zone "." in { type hint; file "db.cache"; }; zone "0.0.127.in-addr.arpa" in { type master; file "db.127.0.0"; }; //forward zone for mydomain.local zone "mydomain.local" { type forward; forwarders { 192.168.1.21; }; };

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• Table 'mysql.host' doesn't exist

  - by eriktm

  100913 10:21:29 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql /usr/local/mysql/libexec/mysqld: Table 'mysql.plugin' doesn't exist 100913 10:21:29 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 100913 10:21:29 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist 100913 10:21:29 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended This is the output from the log-file for mysqld I get when I try to start mysqld with the mysqld_safe command. I tried to run mysql_upgrade to correct the first error, but this command seems to require the server to be started, which is my original problem. Next, it says that the table mysql.host does not exist. I was unable to figure out what this is caused by.

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• Why does everybody have the same MAC address as me?

  - by iblue

  I just bought some consumer-grade McCheap PCI-E NICs (and this was a bad idea). They both have the same MAC address. When I google it, it seems like every card of that company has the same address: 00:50:43:00:45:3e. Shouldn't they be unique? According to lspci it's a Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller (rev 20). Is there a way to permanently flash a new address?

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• When using gt5 in my home directory I get a blank page.

  - by MT

  When using gt5 in various directories on my system (including my home directory) I get blank results. If I limit the max-depth enough, I get results. For example, in my home directory 'gt5 --max-depth 2' produces a listing, while 'gt5 --max-depth 3' produces a blank page. I've noticed that the temporary html file that gets created in tmp (such as '/tmp/gt5.9035.kJVM08Y9/gt5.html' is a zero-byte file. I can successfully do a du in the same directory (which is what I thought gt5 was using), so I'm not sure what to check?

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• In Ubuntu I make changes to php.ini but nothing happens

  - by MrAn3

  Hi, Apache with php works well, but none of the changes I make in php.ini have effect, I've even delete all the contents of the file, then restart Apache, and run phpinfo() and surprisingly everything continues working well. The file I'm editing is the one that appears in the phpinfo() like "Loaded Configuration File". (/etc/php5/apache2/php.ini) P.S. I'm running Ubuntu 9.04 and PHP 5.2 Thanks in advance. More Details: I'm restarting with sudo /etc/init.d/apache2 restart, I've also tried sudo /etc/init.d/apache2 stop, and then start, at restarting I get: Restarting web server apache2 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName ... waiting apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName [ OK ] "which php" did not produce any results. My installation of PHP was done using Synaptic Package Manger, choosing "Mark Packages by task" and then LAMP server. I don't have any clue of what to do...

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• How to Remove the Last 2 Lines of a Very Large File

  - by Russ

  I have a very large file ~400G, and I need to remove the last 2 lines from it. I tried to use sed, but it ran for hours before I gave up. Is there a quick way of doing this, or am I stuck with sed?

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• OpenVPN on port 53

  - by TossUser

  I have an openvpn server setup on UDP port 53 on a public IP. All the connecting clients gets pushed external DNS servers such as 8.8.8.8 and opendns. Sometimes the resolution stops working on the connected vpn clients and I get strange packets in the openvpn log. Now my question is why is that? When a VPN client, let's say 192.168.1.22 does a DNS query that query should go to 8.8.8.8:53 and then an UDP response packet should be sent back to 192.168.1.22 on a high UDP port. Any ideas? Thanks

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• How do you get autofs and updatedb to work together?

  - by Veek.M

  /etc/my.misc sda1 -fstype=ntfs,user,exec :/dev/sda1 sda3 -fstype=ntfs,user,exec :/dev/sda3 sda4 -fstype=ntfs,user,exec :/dev/sda4 /etc/auto.master /my /etc/my.misc --ghost When I run locate .pdf, I get nothing because though the mount points (sda1, sda2, ..) are created in /my - there's nothing in them till I access them. Unfortunately this is not good enough for updatedb and it purges its cache of /my/sdaX files. How do I prevent/solve this problem?

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• Multiple network cards, controlling where my traffic goes

  - by thefinn93

  This is an Ubuntu 12.04 server install. I have multiple network cards, eth0 and eth1 lets call them. eth0 is connected to the internet, and all of my traffic goes through it, until eth1 gets plugged in. Then the machine tries to send everything through eth1, which for various and sundry reasons does not go out to the Interent. The only traffic it doesn't send through eth1 is traffic on eth0's subnet. It also will not accept inbound connections on eth0 from outside of eth0's subnet. I'd like all outbound traffic to go out eth0, but I'd like incoming connections from to either card from any subnet to work.

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• securing communication between 2 Linux servers on local network for ports only they need access to

  - by gkdsp

  I have two Linux servers connected to each other via a cross-connect cable, forming a local network. One of the servers presents a DMZ for the other server (e.g. database server) that must be very secure. I'm restricting this question to communication between the two servers for ports that only need to be available to these servers (and no one else). Thus, communication between the two servers can be established by: (1) opening the required port(s) on both servers, and authenticating according to the applications' rules. (2) disabling IP Tables associated with the NIC cards the cross-connect cable is attached to (on both servers). Which method is more secure? In the first case, the needed ports are open to the external world, but protected by user name and password. In the second case, none of the needed ports are open to the outside world, but since the IP Tables are disabled for the NIC cards associated with the cross-connect cables, essentially all of the ports may be considered to be "open" between the two servers (and so if the server creating the DMZ is compromized, the hacker on the DMZ server could view all ports open using the cross-connect cable). Any conventional wisdom how to make the communication secure between two servers for ports only these servers need access to?

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• `adduser [options] user group` fails ubuntu 11.04

  - by Rob

  I'm want to use adduser However it doesn't seem to work if I provide the second argument for the user's group root@a:~# adduser rick staff adduser: The user `rick' does not exist. The group exists root@a:~# addgroup staff addgroup: The group `staff' already exists. The man page says this should work... adduser [options] user group Any ideas? I can do: adduser --ingroup staff rick So no massive issue, just seems strange.

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• grub2 error: out of disk

  - by Carl Smotricz

  I'm trying to make a 250G USB hard disk Ubuntu-bootable on a Compaq nc6220 laptop. I've removed all other disks, so /dev/sda (the USB disk) is the only disk other than CDROM. I installed Ubuntu 9.10 to this disk from the live CD, putting the bootloader on /dev/sda . The default system couldn't be booted, and nothing I did in the Grub menu/cmdline helped. So I chrooted onto the disk and did grub-install /dev/sda. That seemed to work fine, but Grub (1.97 beta 4) keeps coming up with error: out of disk Even when I drop to the command line to do something simple like ls or help, it's always the same error message. Any hints for resolving this, please?

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• What music streaming app fits my needs on Ubuntu?

  - by Jim

  I'm looking for an application to stream Internet radio on Ubuntu. I like listening to Radio Paradise while I work. Right now, I'm using Amarok. "Movie Player" sometimes refuses to open the stream, and VLC doesn't keep its window title updated with the currently playing track. Amarok has nice translucent notifications when tracks change, but track changes in streams don't trigger the notifications. Mostly, I want something that reliably opens streams and makes it easy to see the name of the track that's playing. If it has a built-in directory of streaming radio stations, that would be a big benefit.

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• View all files with permission 777

  - by Webnet

  Is it possible for me to view all files on the server with a specific permission?

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• Microsoft dans le top 20 des contributeurs au noyau Linux, 75% du code fourni par des développeurs rémunérés

  Microsoft dans le top 20 des contributeurs au noyau Linux 75% du code fourni par des développeurs rémunérés La publication de la liste des contributeurs au noyau Linux vient confirmer une fois de plus que Microsoft voit en l'open source une opportunité plus qu'une menace. L'éditeur qui a déjà pris l'initiative de passer plusieurs de ses projets en open source et d'accepter pour la première fois des contributions externes pour certains, se hisse dans le top 20 des contributeurs au noyau Linux depuis la version ...

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• rsync not writing files

  - by Cyrcle

  I'm trying to setup rsync to backup a remote directory to my local drive. I cd to the directory that I want to pull the files to, then I enter: rsync -vrtW [email protected]:~/public_html I enter the password then it starts running. I get all the files listed, but none of them actually transfer. What am I missing? Thanks

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• Verify that a cron job has completed

  - by skylarking

  Is there a command that can be run to verify that a users cron job has run successfully? Platform is Ubuntu 8.04 LTS. I have scripts in /home/useraccount/bin/ running crontab -l while logged in as user results in: # m h dom mon dow command @hourly /home/useraccount/bin/script_1 @hourly /home/locateruser/bin/script_2 I realize scripts could send email or write to a log with a timestamp, but wondering if there is just a way to verify it ran from the command line.

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