Nix: Reverse a String
Reverse a string with the rev command.
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Nix: Repeat Yourself
Use the repeat command to repeat some other command.
Nix: Merge pdf files
You can use qpdf to merge pdf files into a single file as follow:
Nix: Monitor the progress of data through a pipe
You can use pv to monitor the progress of any pipe, by putting it between input/output pipes.
Nix: List parent pid with ps
The ps command, which stands for process status, is a great way to find different processes running on a machine. Information like their pid (process id) is ...