The way projects are organized at my current employer often requires me to run the same command in within the first level of sub-directories.
For example, maybe I have to issue this command in ten sub-directories:
| 1 | git pull --rebase | 
This little script I wrote helps.
| 1 2 3 4 5 6 7 8 9 10 | #!/bin/bash echo "input command to run on all sub-directories: "; read command;  for directory in ./*/; do     echo $directory $command;     cd $directory;     $command;     cd -;  done |