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rbash: add page
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# rbash
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> Restricted Bash shell
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> Restrictions implemented in rbash
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> cd command
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> PATH and ENV (setting/unsetting)
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> Importing function
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> Specifying file name containing argument ‘/’
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> Specifying file name containing argument ‘-‘
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> Redirecting output using ‘>‘, ‘>>‘, ‘>|‘, ‘<>‘, ‘>&‘, ‘&>‘
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> Turning off restriction using ‘set +r‘ or ‘set +o‘
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- Start rbash:
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`rbash`
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- Execute a command:
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`rbash -c "{{command}}"`
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- Run commands from a file:
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`rbash {{file.sh}}`
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- Print the version information of rbash:
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`rbash --version`
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