4. Scripts Management

The scripts can be placed in a location where it’s defined as $PATH such as /usr/local/bin or ~/.local/bin

• shell scripts can be renamed without extension (it will run as shell as long as shebang is present)
• now we are able to run this script in anywhere in the system

Script Scheduling

at command

Schedule a command to run at specific time.

at 12:34 -f myscript.sh

• -f specify the script file to run

atq
12      Thu Jun 27 17:00:00 2024 a karis
atrm 12 # the id of the command

• atq list all the queued commands with a number
• atrm followed by the number remove the command

cron

• it’s good idea for a cron script to use full path of the command /usr/bin/echo instead of `echo

1 2 3 4 5 command_to_run # run on April 3 and all Fridays during April at 2:01 AM

• minute, hour, day of month (0-30), month (0-12), day of week (1-7)
• * means it will run at all the time