Linux释放内存

释放网页缓存(To free pagecache):

sync;echo1>/proc/sys/vm/drop_caches

释放目录项和索引(To free dentries and inodes):

sync;echo2>/proc/sys/vm/drop_caches

释放网页缓存，目录项和索引（To free pagecache,dentries and inodes）:

sync;echo3>/proc/sys/vm/drop_caches

清理yum缓存

清理yum缓存使用yum clean 命令，yum clean 的参数有headers,packages,Metadata,dbcache,plugins,expire-cache,rpmdb,all

yumcleanheaders#清理/var/cache/yum的headersyumcleanpackages#清理/var/cache/yum下的软件包yumcleanMetadata...