Ubuntu 12.04, named "Precise Pangolin" is the current 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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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 ...
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166 views

Apache 2.2 fails with “unable to write 'random state'” with 2048-bit RSA key (1024-bit works fine)

I'm usually pretty good with Apache and OpenSSL, but this one has me completely baffled. I'm running Apache 2.2.22 and OpenSSL 1.0.1 on a Ubuntu 12.04 LTS Server. I have an IP-based virtual host ...
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40 views

Using Samba for AD and file sharing

We use a combination of Samba and WinBind to allow AD logins on an Ubuntu 12.04 machine. We also use Samba as a file server. We do not want Samba file shares to work for AD logins, but only local ...
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41 views

Change the logical volume

I am quite new this snapshot process. Let, I have three logical volumes as A, B, C. I worked on logical volume C. But accidentally when I restart the system, it goes to the snapshot A. How can I ...
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839 views

rsnapshot frequently ext3-fs error: “ext3_lookup: deleted inode referenced:”

I've having following problem frequently on our backupserver. I'll try to explain the issue in the hope somebody could clarify why and how to fix it Setup details We have a DELL r200 server attached ...
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148 views

Mounting main partition read-only and temporary folders as tmpfs

I have a small embedded board PC which uses flash card to boot and I'm running Ubuntu server 12.04. But since flash cards have limited lifetime I would like to mount it as read only and have only some ...
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182 views

KVM on Ubuntu: Port forwarding to a guest VM

I installed kvm and set several guests on a server using vmbuilder. Here is the following configuration : server host1 (xxx.xxx.xxx.xxx) -> guest vm1 (192.168.0.3) ...
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229 views

VMware Fusion Ubuntu 12.04 LTS Server - Soft Lockup CPU Stuck

I have a strange Stuck Problem with VMware Fusion and Ubuntu 12.04 as Guest System. On High Loaded process the System stucks with "Soft Lockup CPU Stuck" and i have to reboot the VM...the Same System ...
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289 views

Ubuntu NFS Client connecting to Windows 2008 R2 NFS share - permissions issue

I have an Ubuntu 12.04 LTS x64 trying to connect to NFS share on Windows 2008 R2 server - which is a domain member server. I can mount the share in Ubuntu but if I try to ls the mount folder I get ...
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326 views

Courier MYSQL_QUOTA_FIELD isn't working

In /etc/courier/authmysqlrc, I have MYSQL_QUOTA_FIELD CONCAT(quota, 'S') But connecting to the account via RoundCube or Thunderbird with the Display Quota plugin shows an unlimited/unknown quota. ...
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49 views

Client SSL fails with GlusterFS 3.5

I'm running GlusterFS 3.5 from the official Ubuntu packages on Ubuntu 12.04 and when I enable client.ssl, mounting starts to fail. The error I'm getting is: [2014-06-13 10:33:52.690770] E ...
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270 views

Ubuntu 12.04/14.04 - apt-get 404 Not Found [IP: local-dns-server-ip 80] through proxy

I am trying to setup an ubuntu server (12.04 or 14.04) and have installed the server image onto the system I am using. Everything works fine until I try to run sudo apt-get update. When this runs, I ...
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13 views

Connection problema to specific IP

Sometimes, like twice a year a have problems of connectivity from my server to an api server. And only to that api server. Other third party services we use were working fine. I am not so good on the ...
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159 views

How can I properly update Cobbler's distro_signatures.json to support SecurityOnion?

I am trying to install SecurityOnion (an xubuntu 12.04 based linux distrobution) using cobbler. I have followed the instructions here to get cobbler installed from source on Ubuntu 12.04. I have ...
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34 views

FTP login via vsftpd

There seems to be quite a lot of posts about FTP login via vsftpd but none worked for me. I'm aware that FTP is not really secure but I have an uploader page which uses FTP to upload content to ...
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60 views

Bridging Adapter in Ubuntu 12.04 LTS for KVM

Fresh install of Ubuntu 12.04 LTS with libvert/KVM installed. I have 2 virtual machines that I need need to be on the same LAN as the host. The host has two physical interfaces eth0 and eth1. eth1 is ...
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65 views

EC2 - editing .bashrc causes terminal to hang and checks to fail

I've been testing this for the past few hours with no luck. When launching an Ubuntu 12.04 EC2 micro instance, I SSH to it, create a new user and continue with installing Ruby version manger under ...
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154 views

Icinga notification behaviour

The notifications I'm getting and not getting from Icinga don't seem to be making sense and I'm hoping someone here can help me out. It's Icinga 1.10.1 running on Ubuntu 12.04.3 LTS When the host ...
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278 views

Command-line CPU frequency scaling?

How to configure Ubuntu 12.04 Server to dynamically adjust CPU frequency during quiet times? I've found a set of instructions at http://ubuntuforums.org/showthread.php?t=944190, suggesting to add ...
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3k views

NGINX connect() to unix:/var/run/php5-fpm/forums.socket failed

I recently set up my server again with nginx, PHP-FPM. i did what I always do but now the nginx or php-fpm doesn't process php files. ( I test with the simplest form of php phpinfo(); ). In the error ...
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68 views

How do I allow www-data to (negatively) change the niceness of a process in Linux?

So I'm running a website using django and sometimes I call scripts located on the server by spawning a subprocess in python. When looking at the processes with "top" I see these are called under the ...
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38 views

Installation of nagios failed due to ucf and file acls

While installing Nagios give me this error and hence the packages left unconfigured on my server. I looked for some help but they don’t tell me the exact solution. Does any one have a fix. cp: ...
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60 views

PostgreSQL replication lag Ubuntu 11.10/12.04

I've a PostgreSQL cluster running on Amazon AWS EC2 instances with streaming replication and "hot standby" option enabled. I'm now gradually upgrading it from Ubuntu 11.10 to Ubuntu 12.04 LTS and I've ...
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180 views

Volume unreadable in KVM guest after host volume resize

I have a KVM guest requiring more space on one of it's partitions. This partition is actually an LVM volume on the host. So I first unmounted the partition in the guest, switched to the host and ...
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176 views

python ubuntu and ImportError: libblpapi3_64.so: cannot open shared object file: No such file or directory

How do I set a LD_LIBRARY_PATH in ubuntu 12.04? in .bashrc LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/ubuntu/blpapi_cpp/Linux in /etc/environment ...
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296 views

Cannot seem to get Ubuntu Kickstart and preseed to cooperate with partitioning

I am trying to set up a minimal installation for some Ubuntu 12.04 workstations where I can pop in a CD-ROM, hit enter a couple times, and have it build me a ready-made system for imaging and ...
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102 views

Issues forwarding email (Nginx, Postfix)

I'm trying to forward emails from a new Linode VPS I'm (attempting) to setup, and it's not working correctly. I have two gmail accounts. If I test from the account I'm not forwarding to, to the email ...
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129 views

How to confine FTP users to a root directory securely

I need to provide multiple users FTP logins, some able to write, some only to read, to a single FTP root directory. I very much want to restrict access so that they cannot see the file system above ...
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49 views

Restrict users to certain applications only

We are using many applications like zabbix, phabricator, AC etc. We need to integrate LDAP in all these applications. These application support LDAP but not group based authentication. Please let us ...
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47 views

Cache LDAP users from Server 2008 to Ubuntu

Is there a way to cache user creds from a Windows Server 2008 to a Ubuntu server? We have 2 internal Active Directory servers on Windows Server 2008 and we have many different applications that use ...
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128 views

Mounting /var/www for File recovery

I'm in the process of recovering my server's files in a "Rescue" mode. Its a Ubuntu 12.04 with 2x3TB in RAID1. The instructions were to SSH into the server in "Rescue" mode, mount the partitions, ...
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111 views

Samba server: Script before allowing opening a share

I have a small home server running Ubuntu 12.04 with an external hard drive attached to it. The external hard drive is mounted with autofs. Autofs basically unmounts a hard drive if it isn't used for ...
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279 views

LDAP secondary group working for only some users

On an Ubuntu box, I'm having issues with LDAP secondary groups for one user, sabnzbd. The user should be a part of the media group. daniel@server:~$ id sabnzbd uid=4996(sabnzbd) gid=4996(sabnzbd) ...
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167 views

Problems installing Ubuntu on Dell 2950, trying Server 12.04,

I have tried to install Ubuntu Server multiple times to no avail? wondering about other things as well? HDWR Config: 4GB RAM, 4 2-TB drives in Raid 5 Vol configured through Perc5i. When going ...
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117 views

VPC private ip address unable to communicate to the network interface which has an elastic ip assigned

I'm not sure if this is how VPC EC2 private addresses are supposed to work. I have two instances in VPC each are allowed to talk to each other (security group), and each instance has two network ...
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485 views

Warning installing OpenErp 7 on a ubuntu 12.04 virtualized server

I've installed OpenERP 7 on Ubuntu server 12.04.1 on a virtualbox 4.2.6. I followed this useful tutorial. But almost at the end, when I start the openerp server I get several lines of information on ...
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284 views

How does one configure UFW to allow private DNS requests, but block DNS requests from internet

I have an Ubuntu Server 12.04, with two network cards: eth0 is connected to the internet eth1 is connected to a private network (192.168.10.1) The server is configured as a gateway and hosts DNS ...
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129 views

mdadm drive UUIDs chanaged, can they be changed back?

So I ran into this trouble and I believe I lost all my data..However I found an old mdadm --examine --scan file I made a month ago and an old mdadm.conf....Is it possible to use these two items to fix ...
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131 views

Use ISPConfig3-Ubuntu-VMWare as DNS server for Windows 2008R2

I've set up a Loopback Adapter on my Windows with IP 125.0.0.1 in my Windows 2008 host, I've installed ISPConfig3 on Ubuntu-12.04-i386 (VMWare) using tutorial here . The IP for Ubuntu is ...
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197 views

UFW blocks SSL connections Varnish/Apache2 on Ubuntu 12.04

I have installed Virtualmin on a Ubuntu 12.04 server and I'm using LAMP stack with Varnish (:80) in front of Apache (:8000). However, I cannot access https when UFW is enabled. When I disable UFW, all ...
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124 views

SVN post-commit hook failed after Ubuntu upgrade from 11.04 to 12.04

After Ubuntu upgrade from 11.04 to 12.04 all my SVN post-commit hooks doesn't work throwing errors: post-commit hook failed (exit code 1) with output: sudo: no tty present and no askpass program ...
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96 views

rkhunter (1.3.8), crontab, ubuntu 12.04.1 — Very strange behavior

1.3.8-10 Rkhunter, Ubuntu 12.04.1 I have a strange problem with rkhunter. I haven't found anything helpful after googling extensively... for days. If I run rkhunter from crontab I'll get a bunch of ...
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76 views

Nmap SYN Scan blocks all connections?

I have ServerA (running Ubuntu 12.04 (IP: 10.10.10.200)), a KVM DomU of an also Ubuntu Dom0 that is trying to perform a scan against ServerB-ServerZ (Mixed OS (IPs:10.10.10.20-199)) using the command: ...
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106 views

Motd truncated Ubuntu 12.04

I set up the motd to change with update-motd. The file at /etc/motd (and /var/run/motd) does show the full contents, but when I log in through ssh, the motd is not fully shown. Why would this happen? ...
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487 views

MySQL crashes when connecting from localhost with tcp (UNIX sockets work)

I have Ubuntu 12.04 running MySQL server 5.5.24. I can connect with mysql --user root -p. status shows me : ... Connection: Localhost via UNIX socket ... When I try to connect with mysql --host ...
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89 views

Domain root on nginx not working

mydomain.com is running with nginx1.2, php-fpm, apc on an ubuntu server (medium - amazon ec2). I have been tweaking my server for past 6 months, however a problem started occurring since day before ...
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699 views

PureFTPd : ChrootEveryone not working

I have a fresh install of Ubuntu 12.04 with pure-ftpd version 1.0.35-1. I don't use database for the only user I have (ftpuser1 - localuser), but I want to lock him into his home directory. ...
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348 views

grub boot failed after upgrading to ubuntu 12.04 LTS

no such disk error occured. I tried to format and reinstall 12.04, the problem remained. I also repaired with boot-repair, the problem remained. http://paste.ubuntu.com/1224005/ is url of the ...
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409 views

Ubuntu 12.04 Server snort 2.9.2.3 not logging NMAP Scans after first VTR Rules update

I install snort 2.9.2.3 from the Ubuntu repositories along with Oinkmaster. I'm not running LAMP just snort for logging pcap and to the alert log file. Out of the box installation snort worked. ...
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217 views

rsync server, uploaded files permissions incorrect

I'm trying to setup an rsync server on my Ubuntu machine. Transfer from a local PC to the server via rsync does work, but the resultant uploaded files have no r,w or x bits set, e.g. ---------- 1 ...