root@node01:~$ tar-zxvf mongodb-linux-x86_64-ubuntu1604-4.2.8.tgz -C /usr/local

root@node01:~$ vim ./.bashrc

#MongoDBexportMONGODB_HOME=/usr/local/mongodb-3.2.7
exportPATH=$PATH:$MONGODB_HOME/bin

root@node01:~$ source ./.bashrc

root@node01:~$ mongo--versionMongoDB shell version: 3.2.7

root@node01:/usr/local/mongodb-3.2.7$ mkdir-p ./data/db
root@node01:/usr/local/mongodb-3.2.7$ mkdir-p ./log

root@node01:/usr/local/mongodb-3.2.7$ mongod--dbpath data/db --logpath log/mongod.log --fork

root@node01:/usr/local/mongodb-3.2.7$ mongod--dbpath data/db --logpath log/mongod.log --shutdown

root@node01:/usr/local/mongodb-3.2.7$ mongod-f /etc/mongod.conf

#数据存储目录mkdir-p /mongodb/single/data/db
#日志存储目录mkdir-p /mongodb/single/log

vim /mongodb/single/mongod.conf

systemLog:
#MongoDB发送所有日志输出的目标指定为文件# #The path of the log file to which mongod or mongos should send all diagnostic logging information  destination: file
#mongod或mongos应向其发送所有诊断日志记录信息的日志文件的路径  path: "/mongodb/single/log/mongod.log"#当mongos或mongod实例重新启动时，mongos或mongod会将新条目附加到现有日志文件的末尾。  logAppend: truestorage:
#mongod实例存储其数据的目录。storage.dbPath设置仅适用于mongod。##The directory where the mongod instance stores its data.Default Value is "/data/db".  dbPath: "/mongodb/single/data/db"  journal:
#启用或禁用持久性日志以确保数据文件保持有效和可恢复。    enabled: trueprocessManagement:
#启用在后台运行mongos或mongod进程的守护进程模式。  fork: truenet:
#服务实例绑定的IP，默认是localhost  bindIp: localhost
#bindIp#绑定的端口，默认是27017  port: 27017

root@node01:/usr/local/mongodb-3.2.7$ mongod--config /mongodb/single/mongod.conf
about to fork child process, waiting until server is ready for connections.
forked process: 3286child process started successfully, parent exiting

root@node01:/usr/local/mongodb-3.2.7$ ps-ef | grep mongod
root       32861016:35 ?        00:00:23 /usr/local/mongodb-3.2.7/bin/mongod -f /mongodb/single/mongod.conf
root       34213086017:30 pts/0    00:00:00 grep--color=auto mongod

> show dbs;
local  0.000GB

> use dbtest
> show collections

> db.colltest.find()
{ "_id" : 11, "item" : "Pencil", "qty" : 50, "type" : "no.2" }
{ "_id" : ObjectId("6329f410665960c08e8943bf"), "_item" : "pen", "qty" : 20 }
{ "_id" : ObjectId("6329f410665960c08e8943c0"), "item" : "eraser", "qty" : 25 }

db.dropDatabase()

> db.help()
DB methods:
  db.adminCommand(nameOrDocument) - switches to 'admin' db, and runs command [ just calls db.runCommand(...) ]
  db.auth(username, password)
  db.cloneDatabase(fromhost)
  db.commandHelp(name) returns the help for the command
  db.copyDatabase(fromdb, todb, fromhost)
  db.createCollection(name, { size : ..., capped : ..., max : ... } )
  db.createUser(userDocument)
  db.currentOp() displays currently executing operations in the db
  db.dropDatabase()
  db.eval() - deprecated
  db.fsyncLock() flush data to disk and lock server for backups
  db.fsyncUnlock() unlocks server following a db.fsyncLock()
  db.getCollection(cname) same as db['cname'] or db.cname
  db.getCollectionInfos([filter]) - returns a list that contains the names and options of the db's collections  db.getCollectionNames()  db.getLastError() - just returns the err msg string  db.getLastErrorObj() - return full status object  db.getLogComponents()  db.getMongo() get the server connection object  db.getMongo().setSlaveOk() allow queries on a replication slave server  db.getName()  db.getPrevError()  db.getProfilingLevel() - deprecated  db.getProfilingStatus() - returns if profiling is on and slow threshold  db.getReplicationInfo()  db.getSiblingDB(name) get the db at the same server as this one  db.getWriteConcern() - returns the write concern used for any operations on this db, inherited from server object if set  db.hostInfo() get details about the server's host
  db.isMaster() check replica primary status
  db.killOp(opid) kills the current operation in the db
  db.listCommands() lists all the db commands
  db.loadServerScripts() loads all the scripts in db.system.js
  db.logout()
  db.printCollectionStats()
  db.printReplicationInfo()
  db.printShardingStatus()
  db.printSlaveReplicationInfo()
  db.dropUser(username)
  db.repairDatabase()
  db.resetError()
  db.runCommand(cmdObj) run a database command.  if cmdObj is a string, turns it into { cmdObj : 1 }
  db.serverStatus()
  db.setLogLevel(level,<component>)
  db.setProfilingLevel(level,<slowms>) 0=off 1=slow 2=all
  db.setWriteConcern( <write concern doc> ) - sets the write concern for writes to the db
  db.unsetWriteConcern( <write concern doc> ) - unsets the write concern for writes to the db
  db.setVerboseShell(flag) display extra information in shell output
  db.shutdownServer()
  db.stats()
  db.version() current version of the server

rm-f /mongodb/single/data/db/*.lock

/usr/local/mongdb-3.2.7/bin/mongod --repair--dbpath=/mongodb/single/data/db

//客户端登录服务，注意，这里通过localhost登录，如果需要远程登录，必须先登录认证才行。
mongo --port27017//#切换到admin库use admin
//关闭服务
db.shutdownServer()

db.shutdownServer()
Shuts down the current mongod or mongos process cleanly and safely.
This operation fails when the current database is not the admin database.
This command provides a wrapper around the shutdown command.

> db.shutdownServer()
server should be down...
2022-09-20T17:37:40.772+0800 I NETWORK  [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2022-09-20T17:37:40.773+0800 W NETWORK  [thread1] Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2022-09-20T17:37:40.773+0800 I NETWORK  [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed