What to do if the server Linux system is full

Warning: After SSH reported various errors, said the device is busy IO read and write errors are now want to quickly check the system disk.

first of all, it must be clear that:The system disk itself is not used for storing data, the system disk is used to store configuration files and temporary files used, Web site data and important logs are stored in the data disk, often clean the system disk is only to alleviate the current system disk pressure, the fundamental solution is to point the data or log storage path to the data disk.



       1. Perform df-h to view total disk usage
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      2. Execute du-sh/* View disk footprint for all directories thus we can see that the main is/usr and/var 2 directories occupy a larger space
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       3, the execution du-sh/usr/* view the/USR directory sub-directory disk occupancy, so you can see is/usr/local this subdirectory consumes a lot of disk space   
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       4, Executive du-sh/usr/local/* | sort-r | head-n View 10 files in the/usr/local directory that occupy a larger size and sort in descending order
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       650) this.width=650; "alt=" du-sh4.png "class=" Zoom "id=" aimg_2716 "src=" Http://shp.qpic.cn/txdiscuz_pic/0/_bbs_ qcloud_com_forum_201410_24_120033moej9f0ct5jiefjf.png/0 "title=" Du-sh4.png "width=" "style=" Padding:0px;margin : 0px;border:none; "/>
5. At this point, the file that occupies the system disk is found. However, this is only a test, the real situation is to be detailed analysis, if you find a more strange directory file, you can search the Web to find out if the file is useful, whether it can be deleted. However, usually non-/boot/bin/etc/lib/lib64 files are non-system files, the deletion of the system should have little impact,but it's important to make sure before you delete it ..

This article is from the "lake and Laughter" blog, please make sure to keep this source http://hashlinux.blog.51cto.com/9647696/1759286

What to do if the server Linux system is full