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Bash Reference Manual

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6.10 The Restricted Shell

If Bash is started with the name rbash, or the `--restricted' or `-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. A restricted shell behaves identically to bash with the exception that the following are disallowed or not performed:

These restrictions are enforced after any startup files are read.

When a command that is found to be a shell script is executed (see section 3.8 Shell Scripts), rbash turns off any restrictions in the shell spawned to execute the script.


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