Ubuntu 12.04, named "Precise Pangolin" is Long Term Support (LTS) release of Ubuntu Linux. LTS releases receive updates for 5 years and have available paid support from Canonical. The version number comes from the year and month of release (April of 2012).

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49
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5answers
13k views

Monday morning mistake: sudo rm -rf --no-preserve-root /

Here's a an entertaining tragedy. This morning I was doing a bit of maintenance on my production server, when I mistakenly executed the following command: sudo rm -rf --no-preserve-root ...
18
votes
3answers
37k views

What is the ibdata1 file in my /var/lib/mysql directory?

Logging in to my Webmin control panel, I noticed that virtually all of my disk space is full. I searched for the ten largest files/ directories on my system and found that a file called ibdata1 is ...
13
votes
1answer
22k views

NameVirtualHost has no effect

What do you think would be solution to my problem? user@admin:~$ sudo service apache2 restart sudo: unable to resolve host admin * Restarting web server apache2 ...
13
votes
1answer
15k views

Why does snmp fail to use its own MIBs?

I've done a fresh install of Ubuntu 12.04LTS, and installed the snmpd and snmp packages. If I type: snmpwalk -m ALL -v2c -c public localhost 1.3 I get swathes of errors, of the form: Cannot adopt ...
11
votes
1answer
5k views

php-mysqlnd or php-mysql

Long story short: just installed Ubuntu 12.04 (Debian based), nginx, php-fpm and mysql. Now I need the MySQL driver for PHP, but which should I choose? Which is better php-mysqlnd or php-mysql?
11
votes
3answers
3k views

NFS with encrypted ubuntu home directory

I am having trouble getting NFS setup on with vagrant: On my local machine I have installed NFS: apt-get install nfs-common nfs-kernel-server And in my Vagrantfile set it to be used: ...
10
votes
2answers
7k views

Ubuntu Server hanging on adding swap

A fresh install of Ubuntu Server is refusing to boot and hanging on "Adding 524284k swap on /dev/mapper/test--vg-swap_1. Priority:-1 extents:1 across:524284k I can get around this by dropping onto ...
9
votes
3answers
14k views

Do I need to restart my server after editing fstab and mtab?

I'm just wondering if I need to restart my server after editing fstab and mtab. I changed something in this file manually due to problem with awstats report. I am using ISPConfig 3 with the help of ...
8
votes
3answers
4k views

How to mount /tmp in /mnt on EC2?

I was wondering what is the best way to mount the /tmp endpoint in the ephemeral storage /mnt on an EC2 instance and give the ubuntu user default write permissions. Some suggest editing /etc/rc.local ...
8
votes
3answers
5k views

Not able to install Gearman on Ubuntu 12.04

I am trying to install Gearman on my Ubuntu 12.04 machine by following command sudo apt-get install gearman-job-server libgearman-dev sudo apt-get install php-pear php5-dev Above commands run ...
8
votes
2answers
504 views

Prevent Apache from starting after apt-get install

When I apt-get install apache2 the server starts automatically when install completes, and the default Apache configuration makes everything in /var/www/ accessible to the client side. Thus if I have ...
8
votes
1answer
814 views

TCP packet being retransmitted 7 times when sysctl tcp_retries1 is set to 3 - why?

Ubuntu 12.04 I am trying to better understand how many times TCP will attempt to retransmit a packet when it does not receive confirmation the destination received it. After reading the tcp man page ...
8
votes
5answers
564 views

High load due to I/O wait in Ubuntu 12.04 on EC2 instance

I am using Ubuntu server 12.04 , having trouble finding cause of load, I have seen change in response time of server from past week after reading Linux Troubleshooting, Part I: High Load It seems ...
7
votes
4answers
20k views

What do these disk errors in syslog mean?

I just rebooted my monitoring server for the first time in a while, and the following starting filling the screen: Jul 11 23:52:30 monit kernel: [ 25.255908] ata1.00: exception Emask 0x0 SAct 0x0 ...
7
votes
1answer
14k views

How do I set the dns search domain in Ubuntu 12.04?

/etc/resolv.conf is dynamically generated from the contents of /etc/network/interfaces, which on my system contains a line like this: dns-servers 8.8.8.8 How do I include the default search ...
7
votes
2answers
1k views

Sudoers file allow sudo on specific file for active directory group

I have active directory sign in working on an Ubuntu 12.04 box. When the user signs in, I have a script that runs that needs sudo permission (since it modifies the samba config file). How would I ...
7
votes
2answers
4k views

GlusterFS is failing to mount on boot

I'm running the official GlusterFS 3.5 packages on an Ubuntu 12.04 box that is acting as both, client and server, and everything seems to be working fine, except mounting the GlusterFS volumes at boot ...
6
votes
2answers
12k views

opening port 80 on Ubuntu AWS

I'm running a tomcat server on an ubuntu machine hosted in an AWS instance. I can reach the server via public_ip:8080 but when i change the listening port on server.xml from 8080 to 80 connection is ...
6
votes
2answers
11k views

How to reset Ubuntu 12.04 iptables to default without locking oneself out?

Could anyone kindly provide the commands to completely reset the iptables (firewall) for Ubuntu 12.04 to its default "factory" setting? From what I understand, doing this wrong would cause one to be ...
6
votes
3answers
2k views

Is it usually safe to run “apt-get upgrade” (in terms of stability) on a production server?

I often log into my Ubuntu 12.04.2 server (with Postgres 9.2.4 running with live production data) and see something akin to: 4 packages can be updated. 4 updates are security updates. This happens ...
6
votes
2answers
9k views

Used vgextend/lvextend to add addtional 8GB space but it is not reflected in df output

I have created an instance of ubuntu VM in VirtualBox. At the beginning I have only allocated 7GB for the storage and the VM has now run out of space. First I added another 8GB (/dev/sdb) to the VM ...
6
votes
1answer
2k views

Why isn't my upstart service listed in service --status-all

I created a bunch of upstart jobs for my services that I'm running on an Ubuntu 12.04. I can successfully start them and stop with with: service my_service start service my_service stop but they ...
6
votes
2answers
1k views

Postfix master.cf versus main.cf

I see a lot of the time that the same settings can be specified in both main.cf, and also in master.cf using the -o prefix. My question is, does one override the other, and if so, which file is given ...
6
votes
1answer
3k views

Trying to set up SFTP only in a chroot jail for one user

Hopefully you guys can help and see if I've done something weird here, I'm trying to log in with a user I set up, FileZilla shows me: Command: open "///@///" Command: Pass: ******** Status: ...
6
votes
1answer
93 views

Storing secure keys on Ubuntu web server

I'm running Ubuntu 12.04 Precise with a DUNG (Django, Unix, Nginx & Gunicorn) environment and my app (as well as various config files) is stored in a python virtual environment inside /srv, which ...
6
votes
0answers
3k views

How to Build nginx 1.4.0 and ngx_pagespeed in Ubuntu/Debian? [closed]

How to Build nginx 1.4.0 and ngx_pagespeed in Ubuntu Create a directory to download necessary packages (optional) : mkdir pagespeed && cd pagespeed Make sure that you have latest version ...
6
votes
2answers
1k views

Grub2 reports physical volume pv0 not found on server non bootable anymore

I first installed my ubuntu server (11.10 amd64) using lvm but not fully mastering the concept of it. I think that's partly what made the mess of partitions on my two disks (seems to me). I installed ...
5
votes
3answers
10k views

How can I install WildFly 8.0.0.Final as service on Ubuntu Linux?

I am trying to install the WildFly 8.0.0.Final application server on a Virtual Machine running Ubuntu 12.04 LTS. I've done some searches on Google, but I found only third-party scripts and, I think, ...
5
votes
1answer
1k views

iotop and iostat disagree

I'm trying to understand what's going on with my server's disks. It's running Ubuntu 12.04LTS and I'm used to using iostat to know when the disk is the bottleneck. But iostat -xd looks to me like ...
5
votes
3answers
7k views

Correct way to move kvm vm

I'm wondering what is the correct way of moving a VM between two KVM hosts without using any kind of shared storage Would copying the disk files and the XML dump from the source KVM machine to the ...
5
votes
4answers
2k views

12.04 preseeded install with RAID and LVM

I am trying to set up a preseed install (Ubuntu 12.04.03 64-bit) with the following partitioning recipe, but it's just not working and I'm not sure why. Please, Obi-Wan, you're my only hope. The -1 ...
5
votes
2answers
5k views

Windows 2012 hyper-v saying degraded (integration services upgrade required) on Ubuntu 12.04

I have upgraded my Ubuntu 12.04 that runs under hyper-v Windows 2012 server, and since then, hyper-v manager reports that I need to upgrade my integration services under Ubuntu. But I cannot find how ...
5
votes
4answers
3k views

Ubuntu 12.04 host lookups extremely slow

I'm having issues with one of my servers taking a long time to look up host names. This is an Ubuntu 12.04 box, so I've tried following the new resolvconf directives. In my /etc/network/interfaces ...
5
votes
2answers
1k views

No network loopback device after security update ubuntu 12.04

I've had Ubuntu 12.04 on a server for the last several months, with everything working fine. Last night I did an aptitude update && aptitude safe-upgrade to bring in all the latest security ...
5
votes
1answer
837 views

bash tab completion only works for root

I set up an Ubuntu 12 server (on rackspace cloud using their preconfigured image) and created a non-root user. When I log in as the standard user, pressing [TAB] at the terminal outputs an actual tab ...
5
votes
12answers
24k views

Vagrant Error: Connection timeout. Retrying

I have a server with Ubuntu 12.04, Virtualbox 4.3 and Vagrant 1.5.1. I'm trying to use this box http://puppet-vagrant-boxes.puppetlabs.com/centos-64-x64-vbox4210.box however unsucessfully. When I run ...
5
votes
2answers
3k views

Change and initialize Postgresql 9.3 default data and log directories on Ubuntu 12.04 LTS

On Azure with Ubuntu 12.04 LTS image, we're trying to change Postgres 9.3 default data and log file paths and also initialize them for the first time on a secondary drive /mnt/pgdata. We've starting ...
5
votes
2answers
1k views

Unxeplainably high disk IO caused by nginx worker processes

I have just setup a ubuntu 12.04.2 LTS server that serves a big number of quite large static files. The configuration is the same as on another machine which works great. The other machine uses Ubuntu ...
5
votes
1answer
2k views

Intel NIC X540-T1 non-functional in Ubuntu Server 12.04

I have installed three Intel X540-T1's in servers running Ubuntu Server 12.04, but all are non-functional, no link lights, no packets sent or received, and no connection on ip4 or ip6 whether set up ...
5
votes
2answers
372 views

Ubuntu 12 crashed and took down network

We recently set up a new Ubuntu 12.04LTS server on our network. It's not fully configured so it's not doing much beyond sshd and a default apache2 install. But this evening it appears to have ...
5
votes
1answer
1k views

Riak “error”:“insufficient_vnodes_available”

We have 4 nodes Riak installation. They are running on Ubuntu 12.04 LTS Precise installed servers. We have installed 1.1.4 at August 1st 2012 and upgraded 1.2.0 when its available. Server names are: ...
4
votes
2answers
3k views

How do I change, sort, add, remove graphs with Munin?

To keep an eye on what's happening with our production servers I recently discovered Munin. It was trivial to install but I'm having a lot of trouble working out how to add/remove graphs. I found ...
4
votes
3answers
2k views

Install Ubuntu truncate command to Mac OS X 10.7

Is there any way to install Ubuntu's truncate command to Mac OS X 10.7 in order to use the command in Terminal shell?
4
votes
3answers
16k views

Would it be advised to use Ubuntu 14.04 LTS over 12.04 LTS?

I'm unsure how to ask this question, but I'm switching hosting companies and got to migrate everything. I'll probably set up everything up manually, no copy paste work, except the regular files. ...
4
votes
3answers
6k views

How do I enable gzip Compression on NGINX PageSpeed Module resources?

I have been focusing heavily on optimizing a certain website so that it scores 100 on the Google PageSpeed Insights tool (for both mobile and desktop). Most of the items are working flawlessly, but I ...
4
votes
2answers
5k views

Invalid system activity (sysstat) file on Ubuntu server

I'm periodically getting this message from the daily cron on my server. (I don't get this message every day.) /etc/cron.daily/sysstat: Invalid system activity file: /var/log/sysstat//sa28 Here's ...
4
votes
2answers
22k views

How to get USB Devices to AutoMount in Ubuntu 12.04 Server

In Ubuntu 12.04 Desktop, USB devices can be plugged in, and they just work for the most part. In Ubuntu 12.04 Server, when I plug in a USB device it does nothing. How can I setup server do act like ...
4
votes
2answers
6k views

How to share the clipboard between Windows Server 2008R2 and a guest running Ubuntu 12.04? [closed]

I use Windows Server 2008 R2 with Hyper-V and a guest running Ubuntu 12.04 LTS. How can I share the clipboard between Windows Server 2008R2 and a guest running Ubuntu 12.04? UPDATE What protocols ...
4
votes
5answers
7k views

Ubuntu 12.04 LDAP SSL self-signed cert not accepted

I'm working with Ubuntu 12.04, using OpenLDAP server. I've followed the instructions on the Ubuntu help pages and can happily connect without security. To test my connection, I'm using ldapsearch ...
4
votes
1answer
7k views

Is It key_buffer or key_buffer_size?

I search the internet regarding the correct variable in my.cnf file. Some said that key_buffer_size is deprecated, but some said that key_buffer_size is the correct variable in my.cnf. So, what is ...