![]() The option is on by default when the shell is interactive. By default, Bash allows redirected output to overwrite existing files.Ĭauses shell functions to inherit the ERR trap.Įnables style history substitution. Prevents overwriting existing regular files by output redirection. Prints out command arguments during execution. Prints out shell input lines while reading them. Does not apply to special parameters such as wildcard * or verbose Treats unset or undefined variables as an error when substituting (during parameter expansion). Turning it off sets the effective uid and gid to the real uid and gid. The -p option is enabled by default when the real and effective user IDs don't match. Places all assignment arguments in the environment for a command, not just those preceding the command name.ĭisplays a message when a task completes.ĭisables the $ENV file processing and shell functions importing. Locates and saves function commands when a function is defined. Instructs a shell to exit if a command fails, i.e., if it outputs a non-zero exit status. Marks all created or modified variables or functions for export.Īlerts the user upon background job termination. The table below lists all options and their respective alternative form using the -o flag syntax. Most options have a corresponding -o flag that can be used to invoke the option. The set command provides an extensive list of options that can be combined. Failure resulting in a usage message, usually because an argument is missing. Not specifying any options or arguments causes the command to print all shell variables. are positional parameters and they are assigned in order with the following parameters: #Linux setdate plus
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