rbash
restricted bash, see bash (1)
see also :
see - bash
add an example, a script, a trick and tips
examples
source
/bin/rbash --login --norc --noprofile
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,
ENV, or BASH_ENV
•
specifying command names containing /
•
specifying a file name containing a / as an argument to
the . 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 restrictions in the shell spawned to
execute the script.
see also
bash