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Watching a bash Script at Work

Sometimes it is helpful to watch what a bash script is actual doing. This can be done with the parameter -x:

$ bash -x <script>

sort: Change Directory for Temporary Files

To change the directory for temporary files during sort use the parameter -T:

$ sort -T /var/big_filesystem file_to_sort

This can be helpful, if you sort a big file and the default directory (/tmp) is full or too small.

Check the Syntax of a Shell Script

$ bash -n <script>

Does not execute the script, checks the syntax.

Increase and Decrease Numbers in vim

Set the cursor onto a number and press Ctrl-A to increase it or Ctrl-X to decrease it.