Commands by buergi (0)

  • bash: commands not found

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Switch to the previous branch used in git(1)
Very useful if you keep switching between the same two branches all the time.

Display the standard deviation of a column of numbers with awk

PulseAudio: set the volume via command line
If you have more than one SINK

Use top to monitor only all processes with the same name fragment 'foo'
$ pgrep foo may return several pids for process foobar footy01 etc. like this: 11427 12576 12577 sed puts "-p " in front and we pass a list to top: $ top -p 11427 -p 12576 -p 12577

prevent accidents and test your command with echo
if you're using wildcards * or ? in your command, and if you're deleting, moving multiple files, it's always safe to see how those wildcards will expand. if you put "echo" in front of your command, the expanded form of your command will be printed. It's better safe than sorry.

Use the builtin ':' bash command to increment variables
I just found another use for the builtin ':' bash command. It increments counters for me in a loop if a certain condition is met... : [arguments] No effect; the command does nothing beyond expanding arguments and performing any specified redirections. A zero exit code is returned.

Ask user to confirm
Returns true if user presses the key. Use it like $ Confirm "Continue" && do action

Calculate 1**2 + 2**2 + 3**2 + ...

Compare a remote file with a local file

Youtube-dl gone stale on you/stopped working (Ubuntu)?
If you update youtube-dl from the repos, it becomes out-of-date quickly. Luckily, it can auto-update.


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