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Questions tagged [ubuntu]

Free, open-source operating system based on Debian GNU/Linux. Ubuntu questions are on topic here, but if you prefer an Ubuntu-only audience there is Ask Ubuntu (https://askubuntu.com/).

411 votes
11 answers
540k views

How to check which apache modules are enabled/installed?

Which is the most elegant way to check which apache modules are enabled?
udo's user avatar
  • 8,011
403 votes
21 answers
565k views

How do I detach a process from Terminal, entirely?

I use Tilda (drop-down terminal) on Ubuntu as my "command central" - pretty much the way others might use GNOME Do, Quicksilver or Launchy. However, I'm struggling with how to completely detach a ...
user avatar
401 votes
7 answers
283k views

Find what package a file belongs to in Ubuntu/Debian?

I frequently find myself missing a program, man page, or other file when working on my Ubuntu 8.04 system. Is there any simple way to look up what package contains a given file (whether it is ...
Jay Conrod's user avatar
  • 5,680
304 votes
10 answers
789k views

How can I list all IPs in the connected network, through Terminal preferably?

Using Ubuntu 10.10 command line, how can I list all IPs connected to my home network? Ideally, it needs to be a CLI command as I will be running it from C++.
Christopher Gwilliams's user avatar
293 votes
5 answers
238k views

Zsh not hitting ~/.profile

I've just installed zsh on my Ubuntu system. It seems zsh isn't executing ~/.profile on init. To my best understanding, this should be an automatic behavior. What am I missing?
shmichael's user avatar
  • 3,293
293 votes
8 answers
892k views

How do you add a certificate authority (CA) to Ubuntu?

My work has decided to issue their own certificate authority (CA) to handle different aspects of our work securely without paying for certificates. Cryptographically sign emails Encrypt email ...
Xeoncross's user avatar
  • 4,672
245 votes
5 answers
267k views

What does the asterisk mean after a filename when you type `ls -l`?

I've done an ls -l inside a directory, and my files are displaying like this : james@nevada:~/development/tools/android-sdk-linux_86/tools$ ll total 9512 drwxr-xr-x 3 james james 4096 2010-05-07 ...
user155695's user avatar
  • 3,689
233 votes
2 answers
370k views

How to reload /etc/environment without rebooting?

/etc/environment is officially the correct place for system wide environment variables. But how can I reload the assignments in this file without rebooting or relogging? Interestingly enough google ...
fgysin's user avatar
  • 2,988
199 votes
5 answers
486k views

How to mount a HFS partition in Ubuntu as Read/Write?

I plugged in my external harddrive (which was formatted on my Mac into HFS+ journaled) to my Ubuntu desktop 9.04 64bit. I am not able to get the drive to mount with write capability, how do I do that?...
GiH's user avatar
  • 4,027
184 votes
6 answers
83k views

How to tell from what Ubuntu or Debian repository a package comes?

On a Debian-based system, including Ubuntu, how can one tell which repository a package will be downloaded from, without actually beginning the download? aptitude show and apt-cache info will show the ...
gotgenes's user avatar
  • 2,426
178 votes
7 answers
309k views

How to password protect gzip files on the command line?

I want to create some tar.gz (and possibly tar.bz2) files, using the tar command on Ubuntu 10.04. I want to password protect the file. What is the command to do this (I have Googled, but found ...
morpheous's user avatar
  • 4,393
176 votes
16 answers
362k views

How to wipe free disk space in Linux?

When a file is deleted, its contents may still be left in the filesystem, unless explicitly overwritten with something else. The wipe command can securely erase files, but does not seem to allow ...
Alex B's user avatar
  • 2,097
170 votes
7 answers
234k views

No USB devices available in VirtualBox

Oracle VirtualBox is unable to list/filter the USB devices attached to my system. As a result, the guest OS is not able to see any USB device either. This is my configuration: Host: VirtualBox 5.0.0 ...
mguassa's user avatar
  • 1,914
161 votes
4 answers
135k views

How can I launch the GNOME image viewer from the terminal?

It's the default image viewer for Ubuntu, and apparently it's called Eye of Gnome. I would like to be able to launch it from the command line, passing it a file name to open.
James's user avatar
  • 5,109
157 votes
3 answers
196k views

What does the -p flag do in "mkdir -p"?

What does the -p flag do in mkdir -p?
user27449's user avatar
  • 6,970

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