Ubuntu – n easy way to log all activity that a shell script does

bashcommand lineprogrammingscripts

Is there an easy way to log all activity that occurs from a shell script to a file?

I have a script. It outputs things like echo "instructions", as well as other program output. I know the commands:

command | tee -a "$log_file"


command >> logifle.log

What I'm asking is whether there is a shell parameter for logging, or a set command I can use or something like that. I don't necessarily want to add dozens of redirects or tee to files if I don't have to. I still want to get std output though – I just also want it to be logged.:wq

Best Answer

if you normally run your script with foo.sh, try running it (assuming it's a bash script) with bash -x foo.sh. If you want everything redirected to file, try bash -x foo.sh > file.log 2>&1 (note I'm redirecting stderr as well, remove the 2>&1 if you don't want this). If you also want to see what's going on, bash -x foo.sh 2>&1 | tee file.log.