I have several shared folders and I need to find if a user has several folders there. e.g:


I need a bash script that will list those folders and tell me if a user has more than 1 owned folder.

Using bash, how can I get a list of these folders and determine if a user owns more than one?

  • Look at the man page for find and you can easily construct a script yourself. – mdpc Sep 28 '16 at 18:23
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This will shown which users have more than one directory:

find /shared -type d -printf '%u\n' | sort | uniq -dc

This requires GNU find to support the -printf action. Your CentOS will have this.

This will list both the users with more than one directory and their directories:

find /shared -type d -printf '%u %p\0' | awk '{c[$1]++; a[$1]=a[$1](a[$1]?"\n  ":"")$0} END{for (user in c) if (c[user]>1) print c[user],a[user]}' RS="\0"

For maximum flexibility, we used NUL-separated output from find. To work with this, we need GNU awk or recent versions of mawk that supports NUL-separated input. Since you are using CentOS, this should be fine.

How it works

  • find /shared -type d -printf '%u %p\0'

    This tells find to look for directories under /shared and print out their owner, %u, along with the directory name, %p in a NUL-separated list.

  • awk '{c[$1]++; a[$1]=a[$1](a[$1]?"\n ":"")$0} END{for (user in c) if (c[user]>1) print c[user],a[user]}' RS="\0"

    This counts up the number of directories each user has and prints a report for users with more than one. In more detail:

    • c[$1]++ increments the count for the user specified in the first input field.

    • a[$1]=a[$1](a[$1]?"\n ":"")$0} saves the name of each directory found for this user.

    • END{for (user in c) if (c[user]>1) print c[user],a[user]} prints out the report.

    • RS="\0" tells awk to use NUL-separated input. This makes the process safe even if directory names contain newlines or other difficult characters.


Using find:

find /shared -mindepth 1 -maxdepth 1 -type d -user <username>

Replace <username> with the actual username you want to look for.

  • -maxdepth 1 will prevent recursive traversal i.e. will only look at /shared directory

  • -mindepth 1 will prevent listing the /shared directory itself from being listed if owned by <username>, if you don't want this behavior remove this option

  • -type d indicates we are only interested in directories

  • -user <username> indicates we are looking for the <username> owned files (directories)

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