Do you have a favorite "old school" CLI tool that you still use every day? Let us know in the comments!
If you are writing a shell script that needs to increment a counter or calculate a memory offset, expr provides a clean way to output that value directly into a variable. expr 999181396 950248521"
If you are doing multiplication, you must escape the asterisk ( \* ) so the shell doesn't interpret it as a wildcard for files. Conclusion Do you have a favorite "old school" CLI