Clear Linux Cache: Step-by-Step Guide

To clear the cache on a Linux system, you can use the following methods:

1. Synchronize the cache to the disk and release the used buffer and page cache by using the sync command.

$ sync && echo 3 > /proc/sys/vm/drop_caches

1. Use the sysctl command to modify kernel parameters and clean cache.

$ sysctl -w vm.drop_caches=3

1. Check system memory usage using the free command, and clear the cache using the echo command.

$ free -h
$ echo 1 > /proc/sys/vm/drop_caches

1. Use system tools such as BleachBit for clearing caches.

It should be noted that clearing the cache may temporarily decrease system performance, as the files need to be reloaded into the cache after cleaning. Therefore, it is only necessary to clear the cache when memory needs to be released or specific issues need to be resolved.