tldr/pages/common/set.md

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# set
> Display, set or unset values of shell attributes and positional parameters.
> More information: <https://manned.org/set>.
- Display the names and values of shell variables:
`set`
- Mark variables that are modified or created for export:
`set -a`
- Notify of job termination immediately:
`set -b`
- Set various options, e.g. enable `vi` style line editing:
`set -o {{vi}}`
- Set the shell to exit as soon as the first error is encountered (mostly used in scripts):
`set -e`