<aside> 💡 man vs info vs help

• man — concise information on linux commands
• info — detailed information on linux commands
• help — detailed information on bash (built in) commands </aside>

eval

• Executes argument as a shell command
• Combines arguments into a single string
• Returns control to the shell with exit status

<aside> 💡 Bash script runs in a different shell

• PID of current shell — 18616
• PID of shell in which program ran — 21495

</aside>

Functions in bash

• mylib.sh contains functions

• myscript.sh has the code
  • It uses functions from mylib.sh by using source command