By now, if you’ve played around with CentOS 7 (or RHEL 7), you’ve heard that there are now systemd commands you can start using to start, restart and stop various services. They still have the ‘service’ command included for backwards compatibility, but that may go away in future releases. Here’s a little tutorial to help you learn the systemd commands!
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Have you seen this error before? This is because you’re trying to dump the performance_schema database while locking tables.
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Often, you’ll want to use cron to schedule daily, weekly, hourly (etc…) tasks on your linux system(s). cPanel has a little GUI for it, but since I don’t trust GUIs very often, I like just doing it the ‘old fashioned’ way. This little guide will hopefully help you to figure out cron once and for all.
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If you have a large number of accounts on your server, you may also be wasting a lot of space with the error_log files in each account. Some can get very large – and while you want to keep an eye on what the server is complaining about, once you read through them, you can wipe them out with one swift command.
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