Difference between revisions of "Commands"

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* [[dig]] - query a name server for a server's IP address
 
* [[dig]] - query a name server for a server's IP address
 
* [[du]] - find out how much space is used on your disks
 
* [[du]] - find out how much space is used on your disks
* [[echo]] - output a string to [[console]] (rather, to [[stdout]])
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* [[echo]] - output a string to [http://simple.wikipedia.org/wiki/Command_Line_Interface console] (rather, to [[stdout]])
 
** echo mem > /sys/power/state - put the computer into standby-mode
 
** echo mem > /sys/power/state - put the computer into standby-mode
 
* [[ethtool]] - is a network cable connected and which link does it have?
 
* [[ethtool]] - is a network cable connected and which link does it have?

Revision as of 21:24, 17 December 2011

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
  • dig - query a name server for a server's IP address
  • du - find out how much space is used on your disks
  • echo - output a string to console (rather, to stdout)
    • echo mem > /sys/power/state - put the computer into standby-mode
  • 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
  • mkdir - makes a directory
  • netstat - show network connections
  • ps - show running processes
  • route - manage the network routing table
  • scp - copy over the network
  • shred - wipe data off your computer
  • sleep - waits for a given time
  • ssh - call a program over the network on another computer
  • strace - list all syscalls performed by a program
    • strace -e open - list all files that a program reads/writes to/from
  • 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

See also