Unix and Linux Stack Exchange
Unix and Linux Stack Exchange

Most Popular

more tags
1500 questions
153
votes
11 answers

How can I find out which users are in a group within Linux?

I've recently been creating new users and assigning them to certain groups. I was wondering if there is a command that shows all the users assigned to a certain group? I have tried using the 'groups' command however whenever I use this it says…
Jess Louise
  • 1,651
  • 2
  • 11
  • 6
153
votes
6 answers

Where is bash's history stored?

If I run history, I can see my latest executed commands. But if I do tail -f $HISTFILE or tail -f ~/.bash_history, they do not get listed. Does the file get locked, is there a temporary location or something similar?
Adionditsak
  • 3,905
  • 7
  • 21
  • 23
153
votes
5 answers

chroot "jail" - what is it and how do I use it?

I have heard/read a lot about the chroot jail under linux but have never yet used it (I use Fedora day-to-day), so what is a chroot "jail"? When and why might I use it/not use it and is there anything else I should know? How would I go about…
user119
152
votes
14 answers

rm -rf all files and all hidden files without . & .. error

rm -rf /some/path/* deletes all non-hidden files in that dir (and subdirs). rm -rf /some/path/.* deletes all hidden files in that dir (but not subdirs) and also gives the following error/warning: rm: cannot remove directory: `/some/dir/.' rm: cannot…
Jake Wilson
  • 1,623
  • 2
  • 11
  • 6
152
votes
2 answers

What is this folder /run/user/1000?

What is this folder: /run/user/1000 on my Fedora system and what does it do? ~ $ df -h Filesystem Size Used Avail Use% Mounted on tmpfs 1.2G 20K 1.2G 1% /run/user/1000 EDIT: 7 june 2019. My two answers don't agree on what…
somethingSomething
  • 5,721
  • 18
  • 58
  • 98
151
votes
11 answers

How to grep standard error stream (stderr)?

I am using ffmpeg to get the meta info of an audio clip. But I am unable to grep it. $ ffmpeg -i 01-Daemon.mp3 |grep -i Duration FFmpeg version SVN-r15261, Copyright (c) 2000-2008 Fabrice Bellard, et al. configuration: --prefix=/usr…
Andrew-Dufresne
  • 5,663
  • 7
  • 25
  • 19
151
votes
2 answers

Difference between pts and tty

Possible Duplicate: What is the exact difference between a 'terminal', a 'shell', a 'tty' and a 'console'? I always see pts and tty when I use the who command but I never understand how they are different? Can somebody please explain me this?
pradeepchhetri
  • 9,859
  • 12
  • 51
  • 59
151
votes
8 answers

How to sync two folders with command line tools?

Having migrated to Linux from Windows, I would like to find an alternative software to Winmerge or rather learn command line tools to compare and sync two folders on Linux. I would be grateful if you could tell me how to do the following tasks on…
user21417
151
votes
6 answers

Usage of dash (-) in place of a filename

For a command, if using - as an argument in place of a file name will mean STDIN or STDOUT. But in this example, it creates a file with the name -: echo hello > - How can I make - in this example mean STDOUT? Conversely, how can I make - mean a…
Tim
  • 98,580
  • 191
  • 570
  • 977
151
votes
3 answers

Have backticks (i.e. `cmd`) in *sh shells been deprecated?

I've seen this comment many times on Unix & Linux as well as on other sites that use the phrasing "backticks have been deprecated", with respect to shells such as Bash & Zsh. Is this statement true or false?
slm
  • 363,520
  • 117
  • 767
  • 871
151
votes
8 answers

Simple way to create a tunnel from one local port to another?

I have a development server, which is only accessible from 127.0.0.1:8000, not 192.168.1.x:8000. As a quick hack, is there a way to set up something to listen on another port (say, 8001) so that from the local network I could connect…
waitinforatrain
  • 1,615
  • 2
  • 11
  • 7
150
votes
15 answers

How to compare two dates in a shell?

How can two dates be compared in a shell? Here is an example of how I would like to use this, though it does not work as-is: todate=2013-07-18 cond=2013-07-15 if [ $todate -ge $cond ]; then break fi How can I achieve…
Abdul
  • 1,691
  • 2
  • 13
  • 7
150
votes
4 answers

How do I find on which physical device a folder is located?

Specifically: I did sudo mkdir /work, and would like to verify it indeed sits on my harddrive and not mapped to some other drive. How do I check where this folder is physically located?
ripper234
  • 31,063
  • 43
  • 82
  • 90
149
votes
11 answers

How can I remove the BOM from a UTF-8 file?

I have a file in UTF-8 encoding with BOM and want to remove the BOM. Are there any linux command-line tools to remove the BOM from the file? $ file test.xml test.xml: XML 1.0 document, UTF-8 Unicode (with BOM) text, with very long lines
m13r
  • 2,635
  • 2
  • 17
  • 14
149
votes
16 answers

Where should I put software I compile myself?

I need to compile some software on my Fedora machine. Where's the best place to put it so not to interfere with the packaged software?
theotherreceive
  • 2,076
  • 2
  • 16
  • 9
1 2 3
…
99 100