bash shell set 命令

原始链接：set Man Page - Linux - SS64.com

https://ss64.com/bash/set.html

set

Change the value of a shell option and set the positional parameters, or display the names and values of shell variables.

Syntax
      set [--abefhkmnptuvxBCEHPT] [-o option-name] [argument …]
      set [+abefhkmnptuvxBCEHPT] [+o option-name] [argument …]

If no options or arguments are supplied, set displays the names and values of all shell variables and functions, sorted according to the current locale, in a format that can be reused as input. When options are supplied, they set or unset shell attributes.

Options

Using + rather than - will cause the option to be turned off. 

   -a  Mark variables which are modified or created for export. -o allexport

   -b  Cause the status of terminated background jobs to be 
       reported immediately, rather than before printing the
       next primary prompt.  -o notify

   -B  The shell will perform brace expansion. 
       This option is on by default.  -o braceexpand

   -C  Prevent output redirection using '>', '>&',
       and '<>' from overwriting existing files.  -o noclobber

   -e  Exit immediately if a simple command exits with a non-zero status, unless
       the command that fails is part of an until or  while loop, part of an
       if statement, part of a && or || list, or if the command's return status
       is being inverted using !.  -o errexit

   -f  disable file name generation (globbing).  -o noglob

   -h  Locate and remember (hash) commands as they are looked
       up for execution. This option is enabled by default. -o hashall