解决linux中文乱码的问题，及回收linux的cache的内存

查看Linux系统语言

[root@hdss7-200 ~]# locale
LANG=en_US.UTF-8
LC_CTYPE="zh_CN.utf-8"
LC_NUMERIC="zh_CN.utf-8"
LC_TIME="zh_CN.utf-8"
LC_COLLATE="zh_CN.utf-8"
LC_MONETARY="zh_CN.utf-8"
LC_MESSAGES="zh_CN.utf-8"
LC_PAPER="zh_CN.utf-8"
LC_NAME="zh_CN.utf-8"
LC_ADDRESS="zh_CN.utf-8"
LC_TELEPHONE="zh_CN.utf-8"
LC_MEASUREMENT="zh_CN.utf-8"
LC_IDENTIFICATION="zh_CN.utf-8"
LC_ALL=zh_CN.utf-8

只需在系统变量增加下面一行

[root@hdss7-200 ~]# tail -2 /etc/profile
export LC_ALL=zh_CN.utf-8

回收linux的cache的内存

[root@hdss7-12 ~]# free -m
              total        used        free      shared  buff/cache   available
Mem:           1738         343         253           8        1140        1124
Swap:             0           0           0
[root@hdss7-12 ~]# echo 1 > /proc/sys/vm/drop_caches
[root@hdss7-12 ~]# free -m
              total        used        free      shared  buff/cache   available
Mem:           1738         344        1106           8         287        1134
Swap:             0           0           0