What is the meaning of set -o pipefail in the beginning of the shell script ?
What is the meaning of set -o pipefail in Bash Script?
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man bash says
pipefail
If set, the return value of a pipeline is the value of the last (rightmost) command to exit with a non-zero status, or zero if all commands in the pipeline exit successfully. This option is disabled by default.
Where "pipeline" is
command1 | command2 | command3
Without pipefail, the return value of a pipeline is the exit status of the last command.
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