_R_B_A_S_H(1)                    General Commands Manual                   _R_B_A_S_H(1)

NNAAMMEE
       rbash - restricted bash, see bbaasshh(1)

RREESSTTRRIICCTTEEDD SSHHEELLLL
       If bbaasshh is started with the name rrbbaasshh, or the --rr option is supplied at
       invocation,  the  shell becomes _r_e_s_t_r_i_c_t_e_d.  A restricted shell is used
       to set up an environment more controlled than the standard  shell.   It
       behaves  identically  to bbaasshh with the exception that the following are
       disallowed or not performed:

       +o      Changing directories with ccdd.

       +o      Setting or unsetting the values of SSHHEELLLL, PPAATTHH,  HHIISSTTFFIILLEE,  EENNVV,
              or BBAASSHH__EENNVV.

       +o      Specifying command names containing //.

       +o      Specifying  a  filename  containing  a // as an argument to the ..
              builtin command.

       +o      Using the --pp option to the  ..   builtin  command  to  specify  a
              search path.

       +o      Specifying  a  filename containing a slash as an argument to the
              hhiissttoorryy builtin command.

       +o      Specifying a filename containing a slash as an argument  to  the
              --pp option to the hhaasshh builtin command.

       +o      Importing  function  definitions  from  the shell environment at
              startup.

       +o      Parsing the values of BBAASSHHOOPPTTSS and SSHHEELLLLOOPPTTSS from the shell  en-
              vironment at startup.

       +o      Redirecting  output using the >, >|, <>, >&, &>, and >> redirec-
              tion operators.

       +o      Using the eexxeecc builtin command to replace the shell with another
              command.

       +o      Adding or deleting builtin commands with the --ff and  --dd  options
              to the eennaabbllee builtin command.

       +o      Using  the  eennaabbllee  builtin  command  to  enable  disabled shell
              builtins.

       +o      Specifying the --pp option to the ccoommmmaanndd builtin command.

       +o      Turning off  restricted  mode  with  sseett  ++rr  or  sshhoopptt  --uu  rree--
              ssttrriicctteedd__sshheellll.

       These restrictions are enforced after any startup files are read.

       When  a  command  that is found to be a shell script is executed, rrbbaasshh
       turns off any restrictions in the shell spawned to execute the script.

SSEEEE AALLSSOO
       bash(1)

Bash-5.2                       2021 November 22                       _R_B_A_S_H(1)
