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Linux 2.6 - man page for rbash (linux section 1)

RBASH(1)										 RBASH(1)

       rbash - restricted bash, see bash(1)

       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  con-
       trolled	than  the standard shell.  It behaves identically 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 argument to the .  builtin command

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

       o      importing function definitions from the shell environment at startup

       o      parsing the value of SHELLOPTS from the shell environment 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	executed,  rbash  turns  off  any
       restrictions in the shell spawned to execute the script.


GNU Bash-4.0				   2004 Apr 20					 RBASH(1)

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