rbash(1) - man - phpman

RBASH(1)                               General Commands Manual                              RBASH(1)



NAME
       rbash - restricted bash, see bash(1)

RESTRICTED SHELL
       If bash is started with the name rbash, or the -r option is supplied at invocation, the shell
       becomes restricted.  A restricted shell is used to set up an environment more controlled than
       the standard shell.  It behaves identically to bash with the exception that the following are
       disallowed or not performed:

       •      changing directories with cd

       •      setting or unsetting the values of SHELL, PATH, HISTFILE, ENV, or BASH_ENV

       •      specifying command names containing /

       •      specifying a filename containing a / as an argument to the .  builtin command

       •      specifying a filename containing a slash as an argument to the history builtin command

       •      specifying a filename containing a slash as an argument to the -p option to  the  hash
              builtin command

       •      importing function definitions from the shell environment at startup

       •      parsing the value of SHELLOPTS from the shell environment at startup

       •      redirecting output using the >, >|, <>, >&, &>, and >> redirection operators

       •      using the exec builtin command to replace the shell with another command

       •      adding  or  deleting builtin commands with the -f and -d options to the enable builtin
              command

       •      using the enable builtin command to enable disabled shell builtins

       •      specifying the -p option to the command builtin command

       •      turning off restricted mode with set +r or set +o restricted.

       These restrictions are enforced after any startup files are read.

       When a command that is found to be a shell script is executed, rbash turns off  any  restric‐
       tions in the shell spawned to execute the script.

SEE ALSO
       bash(1)



GNU Bash-4.0                                 2004 Apr 20                                    RBASH(1)