UnixToolTip's profile picture. Tips on Unix utilities and related topics from @JohnDCook.

Unix tool tip

@UnixToolTip

Tips on Unix utilities and related topics from @JohnDCook.

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'The enjoyment of one's tools is an essential ingredient of successful work.' -- Donald E. Knuth


Summarizing Emacs cursor movement commands johndcook.com/blog/emacs_mov…


Doing a database join with CSV files johndcook.com/blog/2019/12/3…

UnixToolTip's tweet image. Doing a database join with CSV files

johndcook.com/blog/2019/12/3…

bash lets you use &> to send stdout and stderr to a file. Version 4 or later.


GNU parallel is a shell tool for executing jobs in parallel using one or more computers. gnu.org/software/paral…


'If you had done something twice, you are likely to do it again.' -- Brian Kernighan and Rob Pike


Sort and remove duplicates in large files johndcook.com/blog/2023/08/0…


Using git, add and commit all modified files in one command: git commit -a -m 'commit message'


Rename foo.old to foo.new: mv foo.{old,new}


Create a directory and change into it: mkdir dir && cd $_


Org-mode as a lightweight notebook johndcook.com/blog/2022/08/0…


I don't think I've ever used the kill command without -9. Nuke 'em from orbit. It's the only way to be sure.


The unmount command is umount, no 'n'. Prime candidate for an alias.


sha1sum - compute and check SHA1 message digest


xdg-open will open a file from the commandline using the application associated with its file extension.


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