Difference between revisions of "Commands"

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= What links here =
 
= What links here =
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Revision as of 18:53, 5 October 2010

Here are important commands that you should be aware of:

  • cat - input from stdin or a file and output to stdout or a file
  • cd - change directory
  • date - show and set the system date and time
  • df - find out how much space is free on your disks
  • disown - removes a process from its parent process, allowing it to continue after the parent exits
  • du - find out how much space is used on your disks
  • ethtool - is a network cable connected and which link does it have?
  • fdisk - partition a hard disk
  • file - find out the type of a file
  • hwinfo - find out what harddisk, processor, graphics card and so on you have
  • ldd - list dependencies of an executable file
  • ls - list files
  • lsof - list open files in the system
  • ps - show running processes
  • route - manage the network routing table
  • scp - copy over the network
  • sleep - waits for a given time
  • ssh - call a program over the network on another computer
  • strace - list all syscalls performed by a program
  • tar - pack and unpack file archives
  • top - show the top CPU/RAM consuming processes
  • vmstat - how much I/O is your computer doing?
  • which - where does a program lodge?
  • xosview - gives you a nice overview about system load: CPU, disks, swap etc.
  • zip - pack files so WinZip can extract them

What links here

ls is a command that list files in a given directory. If no directory is given, it lists the files in the current working directory:

tweedleburg:~/svn/kdepim # ls
.emacs-dirvars       README.Kolab           kdgantt1           ktimetracker
.kateconfig          akonadi                kitchensync        lib
[...]

How to...

only list directories

ls -d */

Sort by date

List with the latest changed files below:

ls -ltr

find out the free disk space

You do not use ls, but df:

df -h

tells you how much disk space is left.

find out the size of a directory

You do not use ls, but du:

du -sh directory

See also