Questions tagged [ubuntu]
Ubuntu Linux is a Debian derivative that aims to bring Linux mainstream. Questions on this site should generally refer to Ubuntu Server. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.
16,585
questions
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5
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How to set vim filetype when editing nginx config files
When I open vim for a file like /etc/nginx/sites-available/default, syntax highlighting works fine. But then if I create my own file /etc/nginx/sites-available/myapp, vim does not highlight its syntax....
- 664
25
votes
2
answers
31k
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Automatically keep current version of config files when apt-get install
I need to automatically install a package with its config file already present on the server.
I'm looking for something like:
apt-get install --yes --force-yes --keep-current-confs mysql-server
...
- 1,742
25
votes
7
answers
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How do I upgrade an end-of-life Ubuntu distribution?
My do-release-upgrade fails. I get the following error message:
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www....
- 251
25
votes
8
answers
77k
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Launch Nginx on startup
I was able to install and run nginx, and passenger but i'm not able to have nginx come up whenever i reboot my server. To start the nginx process i just type in sudo /opt/nginx/sbin/nginx. From my ...
Richard Schneeman
25
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8
answers
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Should I completely turn off swap for linux webserver?
Recently my friend told me that it is a good idea to turn off swap on linux webservers with enough memory. My server has 12 GB and currently uses 4GB (not counting cache and buffers) under peak load.
...
- 1,309
25
votes
15
answers
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Can Ubuntu Desktop "become" Ubuntu Server?
Am I correct that Ubuntu desktop and server are the same os but that desktop runs X and lacks things that a server might have like dhcp server, mysqld, apache, etc.? And that if I add those items it ...
- 2,348
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3
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Stop Apache gracefully
Is there a way to stop the Apache server without terminating executing requests, basically a way to tell it - don't accept any more connections and shut down when you finish your current ones?
- 379
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3
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Start Unix screen, Run command, Detach [duplicate]
How can screen be used to start a new session and run a command within that session without killing that session?
screen -S myScreenName runSomething
I tried the above command and it says
[screen ...
- 1,479
25
votes
3
answers
22k
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nginx logging to access.log.1 instead of access.log, logrotate failing?
I have an nginx instance that is set to log access to /var/log/nginx/access.log and errors to /var/log/nginx/errors.log, but as soon as logrotate runs each week, the file gets moves to *.log.1 and the ...
- 825
25
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5
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6k
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A domain I've never heard of resolves to my website [duplicate]
I've discovered (via looking at mod_pagespeed cache entries) that a completely random domain I've never heard of before is resolving to my website.
If I visit this domain, my website loads. The DNS ...
- 648
25
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9
answers
56k
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How to remotely install Linux via SSH?
I need to remotely install Ubuntu Server 10.04 (x86) on a server currently running RHEL 3.4 (x86). I'll have to be very careful because no one can press the restart button for me if anything goes ...
- 2,143
25
votes
1
answer
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add_header directives in location overwriting add_header directives in server
Using nginx 1.2.1 I am able to use add_header under some circumstances.
Here is a working example:
server {
listen 80;
server_name localhost;
root /var/www;
add_header Name1 ...
- 3,563
24
votes
6
answers
37k
views
Enable passwordless access to MySQL
How can I delete my password for MySQL? I dont want to have a password to connect to the database. My server is running Ubuntu.
- 775
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4
answers
18k
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Disable prompts while installing a Debian package
How can i disable totally the prompts that appear while installing a Debian package, i've used all the options that i've found but there are some packages that are still prompting.
I'm using this ...
- 531
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3
answers
35k
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Turning off cp (copy) command's interactive mode (cp : overwrite ?)
Does anyone know how I would turn off the interactive mode when using cp?
I am trying to copy a directory recursively into another and for each file that is getting overwritten I have to answer 'y'.
...
- 343
24
votes
4
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139k
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How to write ISO image to usb memory stick from linux command-line?
I'm having trouble figuring out how I would write an ISO disk image to a USB flash memory device from the command line in Ubuntu. I have the Startup Disk Creator utility, but I need to be able to ...
- 1,067
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4
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hosts file seems to be ignored
I have almost fresh Ubuntu desktop box. OS was installed two weeks ago and updated from karmic repositories. Last week I had no problems with DNS. But this week something had changed. I'm not sure ...
- 343
24
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6
answers
31k
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Ubuntu - can non-root user run process in chroot jail?
Is it possible for a non-root user to run a chroot process on Ubuntu?
- 2,739
24
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2
answers
41k
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why do nginx process run with user nobody
I was trying to setup nginx to run with one of my rails apps, when having a look at output for ps -e | grep nginx , I realised nginx worker processes run with user nobody.
Is there a reason why they ...
- 427
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4
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How to disable all power management in Ubuntu (for a server netbook)?
I need to disable everything related to having the netbook-server go into sleep/hibernate/shutdown. Spinning down the disks during inactivity is fine, but it is crucial that the machine remain in a ...
- 351
24
votes
9
answers
150k
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Why is ntpd not updating the time on my server?
I have ntpd running on my server. It's all the default settings, except I commented out its ability to be a server to other machines:
# restrict -4 default kod notrap nomodify nopeer noquery ...
- 2,364
24
votes
5
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62k
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ulimit -n not changing - values limits.conf has no effect
I am trying to raise the open file descriptor maximum for all users on an ubuntu machine.
This question is somewhat of a follow up to this question.
open file descriptor limits.conf setting isn'...
- 353
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6
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31k
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Prevent SSH connection lost after logging into VPN on server machine
I encountered an issue that I can't deal with.
When I'm logged onto an VPS over SSH and try to estabilish VPN connection on that VPS, the SSH connection between VPS and my machine get lost. I assume ...
- 341
24
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5
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netstat -ntap doesn't show pid/process name for some connections?
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 ...
user13185
23
votes
5
answers
33k
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Adding file to /etc/cron.d doesn't make it run (ubuntu 10.04)
If I scp a cron file into /etc/cron.d it doesn't run unless I edit the file and change the command. Then crond seems to pick up the cron file.
How can I make cron reload its cron files in ubuntu 10....
- 343
23
votes
6
answers
94k
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Ubuntu get PostGreSQL running
I have installed PostGreSQL 8.3 on an Ubuntu machine and I want to configure a pssw for it, however when I run this command:
sudu su postgres -c psql template1
I get the following error:
"psql: ...
- 383
23
votes
6
answers
61k
views
How to run script via SSH that doesn't end when I close connection?
I need to run script, that takes long time to execute, or I just want it to run forever. I can't just SSH to my machine, because when I disconnect it stops running.
Is there any way to run script ...
- 1,794
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5
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console-kit-daemon - can it be stopped?
I have 60 instances of Console Kit daemon on Ubuntu 9.04 server installation. Is it safe to kill those or stop these processes. They seem to be taking about 20% of RAM each(see on htop).
- 458
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How to make upstart back off, rather than give up
I want Upstart to do two things:
stop trying to respawn a failed process so fast
never give up trying to respawn
In an ideal world, upstart would try to restart a dead process after 1s, then double ...
- 2,118
23
votes
5
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Scripted install of MySQL on Ubuntu
I need to write a script that will build my server from a fresh Ubuntu server install. Among things like Apache and PHP it needs to install MySQL. The only problem here is that when I install MySQL ...
- 3,856
23
votes
2
answers
78k
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Nginx - Forward HTTP AUTH - User
I have some trouble with Nginx and Jenkins (Hudson). I am trying to use Nginx as Reverse Proxy for the Jenkins instance with HTTP Basic Authentication.
It works so far, but i have no idea how to pass ...
- 725
23
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4
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31k
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upstart scripts: run a task after networking goes up
I'm working on moving my current server setup to newer hardware, and migrating from ubuntu karmic koala to lucid lynx. Currently i'm using gw6c (compiled from the gogo6 website, as opposed to the ...
- 6,997
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6
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52k
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Rabbitmq -> epmd reports: node 'rabbit' not running at all?
ubuntu@hostname:~$ sudo service rabbitmq-server start
* Starting message broker rabbitmq-server [ OK ]
ubuntu@hostname:~$ sudo service rabbitmq-server stop
* ...
- 369
22
votes
8
answers
13k
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How to configure a shortcut for an SSH connection through a SSH tunnel
My company production servers (FOO, BAR...) are located behind two gateway servers (A, B). In order to connect to server FOO, I have to open a ssh connection with server A or B with my username ...
- 1,534
22
votes
3
answers
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500 Internal Server Error - Invalid command 'Header' in .htaccess
I'm getting in my server error log.
[Mon Jan 27 08:04:06 2014] [alert] [client x.x.x.x] /home/.../public_html/.htaccess: Invalid command 'Header', perhaps misspelled or defined by a module not ...
- 363
22
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2
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50k
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How can I block all but three ports in Ubuntu?
How can I block all ports except for 1962, 999, 12020?
One port for SSH and two others for a kind of script. So, it's necessary to allow outgoing on these ports, right?
My iptables:
# Generated by ...
- 323
22
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3
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80k
views
How to renew dhcp ip address in ubuntu?
This is a simple question in ubuntu server
How do I renew a dhcp assigned IP address?
- 561
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3
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84k
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Completely reset PostgreSQL to default?
Question
Is there a way to completely reset a PostgreSQL installation on Linux, so it is in the same state as when I installed it?
Idea
I have considered
rm -rf /var/lib/pgsql/*
rm -rf /var/lib/...
- 2,590
22
votes
3
answers
99k
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Node.js is not accessible from external IPs on Ubuntu
I'm sure this is very noobish, so forgive me.
I'm trying to run a node.js server on port 8080 of my ubuntu 10.04.
Here's the result of iptables -L on the server:
Chain INPUT (policy ACCEPT)
target ...
- 323
22
votes
1
answer
41k
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How to limit nginx access log file size and compress?
I'm hoping to get some direction on how to set up truncating and gzip'ing on my domains' access logs. I notice that the core nginx access logs get split and compressed by default, yet my individual ...
- 333
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6
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Recover from shutdown during Ubuntu distribution upgrade
I have a computer which was unexpectedly shut down during a distribution upgrade (Ubuntu 8.10 -> 9.04). It now won't finish booting - various X errors, then it goes to the login screen but won't ...
- 1,260
22
votes
2
answers
26k
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How to grant sudo rights only to specific script files?
I would like a user to have sudo rights (without password check) to a couple of shell scripts under a specific directory (in my case, /usr/local/tomcat7/bin), and to nowhere else. What's the simplest ...
- 3,021
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4
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23k
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What are Ubuntu cloud images?
What's the difference between Ubuntu's cloud images and Ubuntu's server images?
- 598
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3
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21k
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Bash prompt on Ubuntu - FQDN (\H) same as hostname (\h)
We've got seperate environments at my workplace for development, testing, integration, and staging.
Within those envs, we've overloaded the hostnames in DNS - e.g. in the dev environment, the primary ...
- 817
22
votes
2
answers
25k
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~/.bashrc is NOT sourced on ssh 'command'
At the end of .bashrc I added:
touch /tmp/bash_noninteractive_test
Run:
/usr/bin/ssh -v -C [email protected] 'ls'
On the host (logged in interactively before):
% ls -l /tmp/bash_noninteractive_test
...
- 1,461
22
votes
1
answer
19k
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Can I have two versions of the same package in an apt repository?
I'm running Ubuntu 10.04 across my entire environment. To make code deploys easier, we are implementing a private apt repository where we can deploy builds of our code.
One of the requirements of ...
- 1,402
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1
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31k
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What's the cause of high LOC interrupts?
I'm seeing huge spikes in LOC interrupts - around 4 million per second, what exactly is the LOC interrupt, what would cause these spikes, and what can I do about it?
Here's a Munin graph illustrating ...
- 1,576
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1
answer
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What is the difference between installing libcurl4-gnutls-dev or libcurl4-nss-dev in ubuntu 11.10?
For a software that I am installing in an ubuntu server, it needs the curl deb packages. When I try to install libcurl4-dev it says that this is a virtual package and I need to install libcurl4-gnutls-...
21
votes
5
answers
31k
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`sudo echo "bla" >> /etc/sysctl.conf` permission denied
Disclaimer: I'm pretty novice at sysadmin stuff.
I'm trying to set up port forwarding in an AWS EC2 instance, this has to be done in the command-line because I don't want to go in and edit anything, ...
- 327
21
votes
2
answers
45k
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ServerName wildcards in Apache name-based virtual hosts?
On our LAN I've set up several 'fake' TLDs in the DNS server, with the intention of using them for Apache name-based virtual hosting. I'd like to combine this with mass-virtual-hosting (i.e. ...
- 7,878