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Valentyn Hruzytskyi
Asked: 2018-11-18 13:48:05 +0800 CST

How to list files by permissions [duplicate]

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In ubuntu we can see a list of files with permissions, simply using the commandls -l. But can I add the filter in this case? For example, a list of all files that are permission set to read only?

command-line

1 Answers

  1. Best Answer

    https://superuser.com/a/396516/959374

    ls doesn't provide this – it's typically used for just tweaking display options. What you can do instead involves using find. For example:

    find . -perm -g+s

    To mimic ls's behavior of only listing files in the current directors, use the -maxdepth 1 option.

    The possible combinations are endless. Refer to the find help linked above for more examples and the syntax differences in using - or / before the mode, also with respect to / being a GNU-only extension and + being used in BSD-style find.

    https://superuser.com/a/396516/959374

    ls does not directly support sorting by permissions, but you can combine it with the sort command:

    ls -l | sort

    You can use the -k option to sort to start matching from a specific character, the format is -k FIELD.CHAR, the permissions are the first field in the ls output. So e.g. -k 1.2 will start from the second character of the permission string, which will ignore any directory / device / link etc. flag, or -k 1.5 for sorting by group permissions.

    If you don't want the additional output of ls -l, you can remove it with awk:

     ls -l | sort | awk '{ print $1, $NF}'

    This will print only the first field (the permissions) and the last one (the filename).

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