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#telnet <ip> 11211 [root@c1 ~]# telnet 127.0.0.1 11211 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'.
set
set在memcached中添加一个key->value，如果这个key之前已经存在，那么就会替换，否则就是添加
语法： set <key> 0(是否需要压缩) 60(过期时间s) 6(字符的长度)
#设置username的值为heboan, 不压缩，过期时间为60s，字符长度为6 set username 0 60 6 heboan STORED
get
从memecached中根据key来获取值
语法： get <key>
get username VALUE username 0 6 heboan END
add
add在memcached中添加一个key->value，如果memcached中已经存在了这个key，那么就添加失败，否则添加成功
语法和set一样
set username 0 60 6 heboan STORED add username 0 60 6 heboan NOT_STORED #username已经存在，添加失败 add love 0 60 8 12345678 STORED #love之前不存在，添加成功
delete
语法： delete <key>
set username 0 60 6 heboan STORED delete username #删除username DELETED get username #删除后，username不存在了 END
flush_all
删除memcached 中所有的数据
set book 0 120 6 python STORED set username 0 120 6 heboan STORED flush_all OK get book END get username END
incr
整数自增
语法： incr <key> num(相加的值)
set age 0 120 2 18 STORED incr age 2 20 incr age 1 21
decr
整数相减
set age 0 120 2 18 STORED decr age 2 16 decr age 6 10
stats
查看memcached的状态
STAT pid 2373 STAT uptime 3214 STAT time 1533343756 STAT version 1.4.15 STAT libevent 2.0.21-stable STAT pointer_size 64 STAT rusage_user 0.037207 STAT rusage_system 0.186036 STAT curr_connections 10 STAT total_connections 16 STAT connection_structures 11 STAT reserved_fds 20 STAT cmd_get 7 STAT cmd_set 11 STAT cmd_flush 1 STAT cmd_touch 0 STAT get_hits 1 STAT get_misses 6 STAT delete_misses 0 STAT delete_hits 1 STAT incr_misses 0 STAT incr_hits 2 STAT decr_misses 0 STAT decr_hits 2 STAT cas_misses 0 STAT cas_hits 0 STAT cas_badval 0 STAT touch_hits 0 STAT touch_misses 0 STAT auth_cmds 0 STAT auth_errors 0 STAT bytes_read 981 STAT bytes_written 855 STAT limit_maxbytes 67108864 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT threads 4 STAT conn_yields 0 STAT hash_power_level 16 STAT hash_bytes 524288 STAT hash_is_expanding 0 STAT bytes 70 STAT curr_items 1 STAT total_items 14 STAT expired_unfetched 2 STAT evicted_unfetched 0 STAT evictions 0 STAT reclaimed 4