Question

7

How can I reset the permissions of /var?

rated 0 times [ 7] [ 0] / answers: 1 / hits: 5798 / 2 Years ago, mon, december 20, 2021, 2:19:01

My friend did a chmod -R 777 /var by mistake. Now he has his /var folder permissions like this:

drwxr-xr-x 15 root   root     4096 Dec 29 17:36 .

drwxr-xr-x 23 root   root     4096 Dec 10 11:15 ..

drwxrwxrwx  2 root   root     4096 Dec 28 09:54 backups

drwxrwxrwx 22 root   root     4096 Nov  9 11:06 cache

drwxrwsrwx  2 root   whoopsie 4096 Dec 31 09:38 crash

drwxrwxrwx  2 root   root     4096 Apr 23  2012 games

drwxrwxrwx 62 root   root     4096 Dec 10 11:06 lib

drwxrwsrwx  2 root   staff    4096 Apr 19  2012 local

lrwxrwxrwx  1 root   root        9 Dec 29 17:36 lock -> /run/lock

drwxrwxrwx 19 root   root     4096 Dec 31 09:54 log

drwxrwsrwx  2 root   mail     4096 Apr 23  2012 mail

drwxrwxrwx  2 root   root     4096 Apr 23  2012 opt

lrwxrwxrwx  1 root   root        4 Dec 29 17:36 run -> /run

drwxrwxrwx 10 root   root     4096 Jun 29  2012 spool

drwxrwxrwx  2 root   root     4096 Dec 31 10:03 tmp

drwxrwsrwx 15 noufal www-data 4096 Dec 28 10:59 www

And I have mine as:

drwxr-xr-x 15 root root     4096 Dec 29 18:16 .

drwxr-xr-x 24 root root     4096 Dec 18 10:03 ..

drwxr-xr-x  2 root root     4096 Dec 31 10:00 backups

drwxr-xr-x 24 root root     4096 Nov  7 15:03 cache

drwxrwsrwt  2 root whoopsie 4096 Dec 31 09:55 crash

drwxr-xr-x  2 root root     4096 Apr 23  2012 games

drwxr-xr-x 74 root root     4096 Dec 29 17:30 lib

drwxrwsr-x  2 root staff    4096 Apr 19  2012 local

lrwxrwxrwx  1 root root        9 Dec 29 18:16 lock -> /run/lock

drwxr-xr-x 23 root root     4096 Dec 31 10:00 log

drwxrwsr-x  2 root mail     4096 Dec 31 10:39 mail

drwxr-xr-x  2 root root     4096 Apr 23  2012 opt

lrwxrwxrwx  1 root root        4 Dec 29 18:16 run -> /run

drwxr-xr-x 10 root root     4096 Jun 22  2012 spool

drwxrwxrwt  6 root root     4096 Dec 31 10:49 tmp

drwxrws--- 31 saji www-data 4096 Nov 27 15:05 www

We have similar systems. How can I reset the /var files and folders permission to the initial state, by not doing it individually for a file/folder.

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splenueak

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2 Years ago

answered 2 Years ago rillrage · Accepted Answer

One way is to install another machine or VM with the same version of the OS and on that machine run this two commands:

find / -exec stat --format "chmod %a %n" {} ; > /tmp/restoreperms.sh

find / -exec stat --format 'chown %U:%G %n' {} ; >> /tmp/restoreperms.sh

command 'find' finds the root directory and checks for their permissions using 'chmod' and save it to a temporary permission file.

Or this one that combines both:

/usr/bin/find / -exec /usr/bin/stat --format="[ ! -L {} ] && /bin/chmod %a %n" {} ; -exec /usr/bin/stat --format="/bin/chown -h %U:%G %n" {} ; > /tmp/restoreperms.sh

then, copy the /tmp/restoreperms.sh file to the machine with broken permissions:

scp /tmp/restoreperms.sh user@ip_address:/tmp/

scp securely copies the permissions stored to a temporary directory /tmp/
and execute it from there.