RBASH(1) 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 identi-
cally to bash with the exception that the following are
disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH,
ENV, or BASH_ENV
o specifying command names containing /
o specifying a file name containing a / as an argu-
ment to the . builtin command
o Specifying a filename containing a slash as an
argument to the -p option to the hash builtin com-
mand
o importing function definitions from the shell envi-
ronment at startup
o parsing the value of SHELLOPTS from the shell envi-
ronment at startup
o redirecting output using the >, >|, <>, >&, &>, and
>> redirection operators
o using the exec builtin command to replace the shell
with another command
o adding or deleting builtin commands with the -f and
-d options to the enable builtin command
o Using the enable builtin command to enable disabled
shell builtins
o specifying the -p option to the command builtin
command
o 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 exe-
cuted (see COMMAND EXECUTION above), rbash turns off any
restrictions in the shell spawned to execute the script.
SEE ALSO
bash(1)
GNU 1999 Nov 29 RBASH(1)
