You’ve left some good tips. sed, awk, and grep. getopts. Read the man pages. Try to automate even simple series of commands. Don’t be shy about running a w

You’ve left some good tips. sed, awk, and grep. getopts. Read the man pages. Try to automate even simple series of commands. Don’t be shy about running a whole pipeline of commands (in an automation script) just to isolate one field within one line of one file and add one to it, and store the result in a shell variable.