环境：
ideal@ideal-PowerEdge-R730xd:~$ cat /etc/issue Ubuntu 16.04.2 LTS \n \l看看本机是否有mongodb，有则删除
ideal@ideal-PowerEdge-R730xd:~$ sudo apt-get autoremove --purge mongodb Reading package lists... Done Building dependency tree Reading state information... Done Package 'mongodb' is not installed, so not removed The following packages will be REMOVED: javascript-common* libboost-program-options1.58.0* libboost-thread1.58.0* libexpat1-dev* libgoogle-perftools4* libjs-jquery* libmysqlclient20* libpcrecpp0v5* libpython-all-dev* libpython-dev* libpython2.7-dev* libsnappy1v5* libtcmalloc-minimal4* libv8-3.14.5* libyaml-cpp0.5v5* mongodb-clients* mongodb-server* mysql-common* python-django-common* python-pip-whl* python2.7-dev* 0 upgraded, 0 newly installed, 21 to remove and 88 not upgraded. After this operation, 259 MB disk space will be freed. Do you want to continue? [Y/n] y # 这里输入“ｙ” (Reading database ... 216448 files and directories currently installed.) ……接下来就开始安装 1. 导入MongoDB公共GPG密钥
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6 创建/etc/apt/sources.list.d/mongodb3.4-org 名单列表文件 echo "deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.4.list 重新加载本地包数据库 sudo apt-get update安装MongoDB包 sudo apt-get install -y mongodb-org我们需要简单配置下，编辑/etc/mongod.conf ideal@ideal-PowerEdge-R730xd:~$ sudo vim /etc/mongod.confmongod.conf 文件如下：
# mongod.conf # for documentation of all options, see: # http://docs.mongodb.org/manual/reference/configuration-options/ # Where and how to store data. storage: dbPath: /var/lib/mongodb # mongodb的数据存放目录 journal: enabled: true # engine: # mmapv1: # wiredTiger: # where to write logging data. systemLog: destination: file logAppend: true path: /var/log/mongodb/mongod.log # 日志存放目录 # network interfaces net: port: 27017 # 设置访问端口，默认27017 bindIp: 192.168.255.1 # 绑定ip，默认127.0.0.1 #processManagement: #security: #operationProfiling: #replication: #sharding: ## Enterprise-Only Options: #auditLog: #snmp:编辑完之后source 一下
ideal@ideal-PowerEdge-R730xd:~$ source /etc/mongod.conf现在我们的mongodb已经安装成功了， 我们来启动下
ideal@ideal-PowerEdge-R730xd:~$ sudo service mongod start接着我们看看是否可以打开mongodb shell 客户端：
ideal@ideal-PowerEdge-R730xd:~$ mongo 192.168.255.1:27017 MongoDB shell version v3.4.4 connecting to: 192.168.255.1:27017 MongoDB server version: 3.4.4 Server has startup warnings: 2017-06-08T10:19:16.241+0800 I CONTROL [initandlisten] 2017-06-08T10:19:16.241+0800 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database. 2017-06-08T10:19:16.241+0800 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted. 2017-06-08T10:19:16.241+0800 I CONTROL [initandlisten] 2017-06-08T10:19:16.242+0800 I CONTROL [initandlisten] 2017-06-08T10:19:16.242+0800 I CONTROL [initandlisten] ** WARNING: You are running on a NUMA machine. 2017-06-08T10:19:16.242+0800 I CONTROL [initandlisten] ** We suggest launching mongod like this to avoid performance problems: 2017-06-08T10:19:16.242+0800 I CONTROL [initandlisten] ** numactl --interleave=all mongod [other options] 2017-06-08T10:19:16.242+0800 I CONTROL [initandlisten] 2017-06-08T10:19:16.242+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. 2017-06-08T10:19:16.242+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never' 2017-06-08T10:19:16.242+0800 I CONTROL [initandlisten] > show dbs admin 0.078GB local 0.078GB >shell 客户端还可以这样启动：
ideal@ideal-PowerEdge-R730xd:~$ mongo -host 192.168.255.1 -port 27017介绍几个管理命令吧： 启动mongod 服务：
sudo service mongod start查看mongod 服务状态：
sudo service mongod status停止mongod 服务：
sudo service mongod stop重启mongod 服务：
sudo service mongod restart卸载mongodb：
sudo apt-get purge mongodb-org* sudo rm -r /var/log/mongodb sudo rm -r /var/lib/mongodb这里没有配置帐户和密码，而且只搭了一台，也可以搭一个mongodb集群，设置主从，支持切片操作。这里有以前写的数据导出文章点击此处。本文只是作为笔记。。。
记录一个centos下mongodb的错误： 错误原因是因为我用kill -9 xxxx”杀死了mongodb的进程；重新启动会报如下错误：
[root@crawl ~]# mongod -f /etc/mongod.conf & [1] 3056 [root@crawl ~]# about to fork child process, waiting until server is ready for connections. forked process: 3058 ERROR: child process failed, exited with error number 100我的解决办法就是删除mongod.lock 文件
[root@crawl ~]# locate mongod.lock /var/lib/mongo/mongod.lock [root@crawl ~]# cd /var/lib/mongo/ [root@crawl mongo]# ls journal local.0 local.ns mongod.lock SinaComment3.0 SinaComment3.1 SinaComment3.ns storage.bson [root@crawl mongo]# rm mongod.lock rm: remove regular file 'mongod.lock'? y [root@crawl mongo]#然后重启mongod
[root@crawl mongo]# mongod -f /etc/mongod.conf & [1] 13140 [root@crawl mongo]# about to fork child process, waiting until server is ready for connections. forked process: 13143 child process started successfully, parent exiting ^C [1]+ Done mongod -f /etc/mongod.conf [root@crawl mongo]#问题以解决，打开mongo shell看看
[root@crawl mongo]# mongo 192.168.255.151:27017 MongoDB shell version: 3.0.14 connecting to: 192.168.100.151:27017/test Server has startup warnings: 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended. 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never' 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'. 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never' 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 200153 processes, 1024000 files. Number of processes should be at least 512000 : 0.5 times number of files. 2017-06-15T10:15:01.737+0800 I CONTROL [initandlisten] > show dbs SinaComment3 0.203GB local 0.078GB > exit bye [root@crawl mongo]正常关闭mongodb如下： 先通过shell连上服务器： mongo use admin db.shutdownServer() 这种方法必须是有用户认证，否则会报错
或者直接kill -15 ,注意kill -9 可能会导致数据文件损坏
参考文章https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/
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