解决mongo 端口占用问题

在打开mongod之后如果不用了就按ctrl + c ，就不会出现以下的问题了

执行mongod报错

 mongod
2016-08-03T14:31:15.691+0800 I CONTROL  [initandlisten] MongoDB starting : pid=13659 port=27017 dbpath=/data/db 64-bit host=yishiyaonie.local
2016-08-03T14:31:15.691+0800 I CONTROL  [initandlisten] db version v3.2.8
2016-08-03T14:31:15.691+0800 I CONTROL  [initandlisten] git version: ed70e33130c977bda0024c125b56d159573dbaf0
2016-08-03T14:31:15.691+0800 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.2h  3 May 2016
2016-08-03T14:31:15.691+0800 I CONTROL  [initandlisten] allocator: system
2016-08-03T14:31:15.692+0800 I CONTROL  [initandlisten] modules: none
2016-08-03T14:31:15.692+0800 I CONTROL  [initandlisten] build environment:
2016-08-03T14:31:15.692+0800 I CONTROL  [initandlisten]     distarch: x86_64
2016-08-03T14:31:15.692+0800 I CONTROL  [initandlisten]     target_arch: x86_64
2016-08-03T14:31:15.692+0800 I CONTROL  [initandlisten] options: {}
2016-08-03T14:31:15.692+0800 E NETWORK  [initandlisten] listen(): bind() failed errno:48 Address already in use for socket: 0.0.0.0:27017
2016-08-03T14:31:15.692+0800 E NETWORK  [initandlisten]   addr already in use
2016-08-03T14:31:15.692+0800 E STORAGE  [initandlisten] Failed to set up sockets during startup.
2016-08-03T14:31:15.692+0800 I CONTROL  [initandlisten] dbexit:  rc: 48
原因是端口被占用了 
咋办呢？
➜  xushukui ps -aux | grep mongod
root     17820  2.7  1.3 277020 52520 pts/19   Tl   20:24   0:00 mongod
root     17857  0.0  0.0  15984   984 pts/19   S+   20:24   0:00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn mongod
➜  xushukui kill -9 17820
[1]  + 17820 killed     mongod
然后重启ok了：
mongod
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten] MongoDB starting : pid=17904 port=27017 dbpath=/data/db 64-bit host=xushukui-Lenovo-Erazer-Z41-70
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten] db version v3.2.19
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten] git version: a9f574de6a566a58b24d126b44a56718d181e989
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.2g  1 Mar 2016
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten] allocator: tcmalloc
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten] modules: none
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten] build environment:
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten]     distmod: ubuntu1604
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten]     distarch: x86_64
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten]     target_arch: x86_64
2018-03-19T20:25:05.986+0800 I CONTROL  [initandlisten] options: {}
2018-03-19T20:25:06.017+0800 I -        [initandlisten] Detected data files in /data/db created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
2018-03-19T20:25:06.017+0800 W -        [initandlisten] Detected unclean shutdown - /data/db/mongod.lock is not empty.
2018-03-19T20:25:06.017+0800 W STORAGE  [initandlisten] Recovering data from the last clean checkpoint.
2018-03-19T20:25:06.017+0800 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=1G,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),verbose=(recovery_progress),
2018-03-19T20:25:06.257+0800 I STORAGE  [initandlisten] WiredTiger [1521462306:257852][17904:0x7f1bca6a5c80], txn-recover: Main recovery loop: starting at 6/128
2018-03-19T20:25:06.258+0800 I STORAGE  [initandlisten] WiredTiger [1521462306:258184][17904:0x7f1bca6a5c80], txn-recover: Recovering log 6 through 7
2018-03-19T20:25:06.273+0800 I STORAGE  [initandlisten] WiredTiger [1521462306:273354][17904:0x7f1bca6a5c80], file:index-1-3052586711455020830.wt, txn-recover: Recovering log 7 through 7
2018-03-19T20:25:07.021+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2018-03-19T20:25:07.022+0800 I CONTROL  [initandlisten] 
2018-03-19T20:25:07.022+0800 I CONTROL  [initandlisten] 
2018-03-19T20:25:07.022+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2018-03-19T20:25:07.022+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2018-03-19T20:25:07.022+0800 I CONTROL  [initandlisten] 
2018-03-19T20:25:07.022+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2018-03-19T20:25:07.022+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2018-03-19T20:25:07.022+0800 I CONTROL  [initandlisten] 
2018-03-19T20:25:07.023+0800 I NETWORK  [HostnameCanonicalizationWorker] Starting hostname canonicalization worker
2018-03-19T20:25:07.023+0800 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data'
2018-03-19T20:25:07.023+0800 I NETWORK  [initandlisten] waiting for connections on port 27017