chown
From Wikipedia, the free encyclopedia
For the surname, see Chown (surname).
The chown command (abbreviation for change owner) is used on Unix-like systems to change the owner of a file. In most implementations[citation needed], it can only be executed by the superuser[why?]. Unprivileged (regular) users who wish to change the group of a file that they own may use chgrp.
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Usage examples
These examples illustrate typical syntax and use. Because chown modifies permissions, it usually requires root privilege to run.
Change the owner of /var/run/httpd.pid to 'root' (the standard name for the Superuser).
# chown root /var/run/httpd.pid
Change the owner of strace.log to 'rob' and the group identifier to 'developers'.
# chown rob:developers strace.log
Change the owner of /tmp and /var/tmp to ‘nobody’ (not a good idea), and change the group of /tmp and /var/tmp to ‘nogroup’
# chown nobody:nogroup /tmp /var/tmp
Change the group identifier of /home to 512 (regardless of whether a group name is associated with the identifier 512 or not).
# chown :512 /home
Change the ownership of base to the user foouser and make it recursive (-R)
# chown -R foouser base
Change the ownership to newuser and group to newgroup for all of the files and directories in current directory, and all subdirectories (recursively).
# chown -R newuser:newgroup .
chown -R nobody:nogroup
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