Set command detail: On, turn off Shell feature properties

Set is a shell internal command to turn shell feature properties on or off, and if nothing is added, the user-defined variables and environment variables are displayed directly

Syntax: Set [Options ...]

Options:

- F : Disable wildcard characters

+f : Enable wildcard characters

- u : If there are variables that are not set in the script, immediately let the script exit execution and display an error message

+u : If the "-u" option is set, the function of the "-u" option is turned off

- e : Exit immediately if command execution fails (terminal or script)

+e : The ability to turn off the "-e" option if the "-e" option is set

- M : Enable Job control

+m : Turn off Job control

- v : Show shell input line

+v : Turn off the "-V" option if the "-V" option is set

- x : Displays commands and their arguments at execution time

+x : If the "-X" option is set, the function of the "-X" option is turned off

- N : Used to check syntax; in script, read command, but do not execute

+n : If the "-N" option is set, the function of the "-n" option is turned off

- H : Enable "! [NUMBER],!! Call History command (enabled by default)

+h : Off! " [NUMBER],!! The Call History command

- C : If set, does not allow overwriting of existing regular files by redirecting output

+c : If the "-C" option is set, the function of the "-C" option is turned off

- P : If set, do not follow the soft link when executing the command, but go directly to the directory that the soft link points to

+p : If the "-P" option is set, the function of the "-P" option is turned off

- o : Special Options

History : Enable history command

ignoreeof : Disable "Ctrl+d" to exit the shell, if you want to exit, you need to use "exit"

interactive-comments : Under Interactive default, #用来做注释 (enabled by default)

Cases:

Disable system wildcard characters

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To open a wildcard character

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Command execution failed to exit

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Show shell input Lines

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No use! Call History command

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Disable overwrite redirection

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Set command detail: On, turn off Shell feature properties