How to Clear Disk Space on CentOS 6 or CentOS 7

Following are the quick commands to clear disk space on your CentOS 6 or CentOS 7 server.

First you need to install the yum-utils package:

yum -y install yum-utils

1. Prune log files

find /var -name "*.log" ( ( -size +50M -mtime +7 ) -o -mtime +30 ) -exec truncate {} --size 0 ;

This will truncate all *.log files on the /var volume that are older than 7 days and larger than 50M or older than 30 days.

2. Clean up the YUM cache

Cleaning the yum cache is simple:

yum clean all

Please note that the above command will not remove all the files associated with yum that have been installed.

You may want to free up space occupied by orphaned data in disabled or deleted repositories:

rm -rf /var/cache/yum

Also, when you accidentally yum through a normal user (forget sudo), yum will create a user cache. So we remove that as well:

rm -rf /var/tmp/yum-*

3. Delete orphan packages

Check for existing orphan packages

package-cleanup --quiet --leaves --exclude-bin

Confirm deletion of orphaned packages

Now, if you are happy with the suggestions given by the previous command, run:

package-cleanup --quiet --leaves --exclude-bin | xargs yum remove -y

4. Delete WP CLI cached WordPress downloads

Every time you set up a new WordPress site, WP CLI saves a WordPress archive. You can delete these caches with the following command:

rm -rf /root/.wp-cli/cache/*
rm -rf /home/*/.wp-cli/cache/*

5. Delete the old kernel

Before removing the old kernel, you may want to reboot first so that you can boot from the latest kernel.

Because you can't remove old kernels from the current boot system 🙂

The following command will keep only the 2 most recent kernels:

package-cleanup --oldkernels --count=2

Note that with some VPS providers (such as Linode), the server defaults to using a kernel built by the provider, rather than the server's own kernel. Therefore, it makes no sense to keep more than 1 old kernel on your system. so:

package-cleanup --oldkernels --count=1

6. Delete Composer Cache

rm -rf /root/.composer/cache
rm -rf /home/*/.composer/cache

7. Delete core dumps

If you have some serious PHP glitch that causes it to segfault and enable core dumps, then chances are - you have a lot of them.
They are not needed once you are done debugging the problem. so:

find -regex ".*/core\.[0-9]+$" -delete

8. Delete the error_log file (cPanel)

If you use a nasty cPanel, you will surely have dozens of error_log files scattered throughout your web directory. If you can install Citrus Stack, that's much better. A temporary solution is to delete all of these files:

find /home/*/public_html/ -name error_log -delete

9. Delete Node.js cache

rm -rf /root/.npm /home/*/.npm /root/.node-gyp /home/*/.node-gyp /tmp/npm-*

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.