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, al
yum clean headers
#清理/var/cache/yum的headers
yum clean packages
#清理/var/cache/yum下的软件包
yum clean metadata
Linux释放内存 释放网页缓存(To free pagecache):
sync; echo 1 > /proc/sys/vm/drop_caches
释放目录项和索引(To free dentries and inodes):
sync; echo 2 > /proc/sys/vm/drop_caches
释放网页缓存,目录项和索引(To free pagecache, dentries and inodes):
sync; echo 3 > /proc/sys/vm/drop_caches
下面是我实际的数据。
free -m
#查看内存
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