不多说，直接上干货！
说在前面的话
首先，查看下你的操作系统的版本。
root@zhouls-virtual-machine:~# cat /etc/issue
Ubuntu 16.04. LTS \n \l root@zhouls-virtual-machine:~#
我的是Ubuntu 16.04.4
我的环境在Ubuntu16.04下搭建，注意：不同版本之间可能存在兼容性(其他的如14.04，我也暂时测试过)
Ubuntu14.04下Mongodb安装部署步骤（图文详解）
root@zhouls-virtual-machine:~# mongo
The program 'mongo' is currently not installed. You can install it by typing:
apt-get install mongodb-clients
root@zhouls-virtual-machine:~#
这里，建议大家不要直接就输入apt-get install mongodb-clients来安装。
这样有两点问题：
1.安装的是客户端
2.版本问题，这个很重要，项目中mongo数据库用的是2.6，而apt-get自动安装的根本不知道是什么版本，而mongodb不同版本之间是不能兼容的。所以如果根据需要是迁移数据库之类的，这样到后面会有超级一大堆的错误。
Mongodb安装包的下载
mongo官网下载地址 （进入）
根据自己的需要选择版本下载，需要注意亮点：
1.大版本保持一致，因为大版本之间不兼容
2.mongodb亦按照基数版本不稳定的规则，一般用于生产环境的都是偶数版本，如果安装的是基数(例如2.7)，进入时会出现一下提示。
我这里，就选择最简单的和免费的，社区服务版本。
我一般喜欢用tar.gz来下载安装，当然大家也可以选择用rpm方式来安装。
我这里，就选择最简单的和免费的，社区服务版本。
https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu1604-3.4.4.tgz
我一般喜欢用tar.gz来下载安装，当然大家也可以选择用rpm方式来安装。
https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu1604-3.4.4.tgz
或者
大家，也可以安装最新的稳定版 MongoDB 或指定版本的 MongoDB。
安装MongoDB最新的稳定版本
使用下列命令：
sudo apt-get install -y mongodb-org
如果你想安装指定版本的MongoDB，请按照下面的方法。
下面的例子安装 3.2.0 版本的 MongoDB：
MongoDB的不同组件都可以指定相应的版本号
sudo apt-get install -y mongodb-org=3.2. mongodb-org-server=3.2. mongodb-org-shell=3.2. mongodb-org-mongos=3.2. mongodb-org-tools=3.2.
mongodb的安装部署
下载解压
我这里，先暂时是，放在/home/zhouls/Downloads/下
zhouls@zhouls-virtual-machine:~/Downloads$ sudo -s
[sudo] password for zhouls:
root@zhouls-virtual-machine:~/Downloads# pwd
/home/zhouls/Downloads
root@zhouls-virtual-machine:~/Downloads# ls
mongodb-linux-x86_64-ubuntu1604-3.4..tgz vmware-tools-distrib
root@zhouls-virtual-machine:~/Downloads# tar -zxvf mongodb-linux-x86_64-ubuntu1604-3.4.4.tgz
mongodb-linux-x86_64-ubuntu1604-3.4./README
mongodb-linux-x86_64-ubuntu1604-3.4./THIRD-PARTY-NOTICES
mongodb-linux-x86_64-ubuntu1604-3.4./MPL-
mongodb-linux-x86_64-ubuntu1604-3.4./GNU-AGPL-3.0
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongodump
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongorestore
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongoexport
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongoimport
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongostat
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongotop
mongodb-linux-x86_64-ubuntu1604-3.4./bin/bsondump
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongofiles
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongooplog
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongoreplay
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongoperf
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongod
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongos
mongodb-linux-x86_64-ubuntu1604-3.4./bin/mongo
root@zhouls-virtual-machine:~/Downloads#
mongodb不需要像别的数据库那样配置解压后放到/usr/local
但是为了方便管理，最好还是放到usr/local下面。
命令如下：
root@zhouls-virtual-machine:~/Downloads# ls
mongodb-linux-x86_64-ubuntu1604-3.4. vmware-tools-distrib
mongodb-linux-x86_64-ubuntu1604-3.4..tgz
root@zhouls-virtual-machine:~/Downloads# mv mongodb-linux-x86_64-ubuntu1604-3.4.4 /usr/local/mongodb
root@zhouls-virtual-machine:~/Downloads# cd /usr/local
root@zhouls-virtual-machine:/usr/local# pwd
/usr/local
root@zhouls-virtual-machine:/usr/local# ls
bin etc games include lib man mongodb sbin share src
root@zhouls-virtual-machine:/usr/local#
初步认识下，mongdb的目录结构
root@zhouls-virtual-machine:/usr/local/mongodb# pwd
/usr/local/mongodb
root@zhouls-virtual-machine:/usr/local/mongodb# ls
bin GNU-AGPL-3.0 MPL- README THIRD-PARTY-NOTICES
root@zhouls-virtual-machine:/usr/local/mongodb#
然后为了mongodb创建存储数据的文件目录和日志文件目录
root@zhouls-virtual-machine:/usr/local/mongodb# pwd
/usr/local/mongodb
root@zhouls-virtual-machine:/usr/local/mongodb# ls
bin GNU-AGPL-3.0 MPL- README THIRD-PARTY-NOTICES
root@zhouls-virtual-machine:/usr/local/mongodb# mkdir data
root@zhouls-virtual-machine:/usr/local/mongodb# mkdir log
root@zhouls-virtual-machine:/usr/local/mongodb# ls
bin data GNU-AGPL-3.0 log MPL- README THIRD-PARTY-NOTICES
root@zhouls-virtual-machine:/usr/local/mongodb#
进入到mongodb下面的bin里面查看mongodb帮助文档
root@zhouls-virtual-machine:/usr/local/mongodb# pwd
/usr/local/mongodb
root@zhouls-virtual-machine:/usr/local/mongodb# ls
bin data GNU-AGPL-3.0 log MPL- README THIRD-PARTY-NOTICES
root@zhouls-virtual-machine:/usr/local/mongodb# cd bin
root@zhouls-virtual-machine:/usr/local/mongodb/bin# pwd
/usr/local/mongodb/bin
root@zhouls-virtual-machine:/usr/local/mongodb/bin# ls
bsondump mongodump mongoimport mongoreplay mongostat
mongo mongoexport mongooplog mongorestore mongotop
mongod mongofiles mongoperf mongos
root@zhouls-virtual-machine:/usr/local/mongodb/bin# ./mongod -h
Options: General options:
-h [ --help ] show this usage information
--version show version information
-f [ --config ] arg configuration file specifying
additional options
-v [ --verbose ] [=arg(=v)] be more verbose (include multiple times
for more verbosity e.g. -vvvvv)
--quiet quieter output
--port arg specify port number - by default
--bind_ip arg comma separated list of ip addresses to
listen on - all local ips by default
--ipv6 enable IPv6 support (disabled by
default)
--maxConns arg max number of simultaneous connections
- by default
--logpath arg log file to send write to instead of
stdout - has to be a file, not
directory
--syslog log to system's syslog facility instead
of file or stdout
--syslogFacility arg syslog facility used for mongodb syslog
message
--logappend append to logpath instead of
over-writing
--logRotate arg set the log rotation behavior
(rename|reopen)
--timeStampFormat arg Desired format for timestamps in log
messages. One of ctime, iso8601-utc or
iso8601-local
--pidfilepath arg full path to pidfile (if not set, no
pidfile is created)
--keyFile arg private key for cluster authentication
--noauth run without security
--setParameter arg Set a configurable parameter
--httpinterface enable http interface
--transitionToAuth For rolling access control upgrade.
Attempt to authenticate over outgoing
connections and proceed regardless of
success. Accept incoming connections
with or without authentication.
--clusterAuthMode arg Authentication mode used for cluster
authentication. Alternatives are
(keyFile|sendKeyFile|sendX509|x509)
--nounixsocket disable listening on unix sockets
--unixSocketPrefix arg alternative directory for UNIX domain
sockets (defaults to /tmp)
--filePermissions arg permissions to set on UNIX domain
socket file - by default
--fork fork server process
--networkMessageCompressors arg Comma-separated list of compressors to
use for network messages
--auth run with security
--jsonp allow JSONP access via http (has
security implications)
--rest turn on simple rest api
--slowms arg (=) value of slow for profile and console
log
--profile arg =off =slow, =all
--cpu periodically show cpu and iowait
utilization
--sysinfo print some diagnostic system
information
--noIndexBuildRetry don't retry any index builds that were
interrupted by shutdown
--noscripting disable scripting engine
--notablescan do not allow table scans
--shutdown kill a running server (for init
scripts) Replication options:
--oplogSize arg size to use (in MB) for replication op
log. default is % of disk space (i.e.
large is good) Master/slave options (old; use replica sets instead):
--master master mode
--slave slave mode
--source arg when slave: specify master as
<server:port>
--only arg when slave: specify a single database
to replicate
--slavedelay arg specify delay (in seconds) to be used
when applying master ops to slave
--autoresync automatically resync if slave data is
stale Replica set options:
--replSet arg arg is <setname>[/<optionalseedhostlist
>]
--replIndexPrefetch arg specify index prefetching behavior (if
secondary) [none|_id_only|all]
--enableMajorityReadConcern enables majority readConcern Sharding options:
--configsvr declare this is a config db of a
cluster; default port ; default
dir /data/configdb
--shardsvr declare this is a shard db of a
cluster; default port SSL options:
--sslOnNormalPorts use ssl on configured ports
--sslMode arg set the SSL operation mode
(disabled|allowSSL|preferSSL|requireSSL
)
--sslPEMKeyFile arg PEM file for ssl
--sslPEMKeyPassword arg PEM file password
--sslClusterFile arg Key file for internal SSL
authentication
--sslClusterPassword arg Internal authentication key file
password
--sslCAFile arg Certificate Authority file for SSL
--sslCRLFile arg Certificate Revocation List file for
SSL
--sslDisabledProtocols arg Comma separated list of TLS protocols
to disable [TLS1_0,TLS1_1,TLS1_2]
--sslWeakCertificateValidation allow client to connect without
presenting a certificate
--sslAllowConnectionsWithoutCertificates
allow client to connect without
presenting a certificate
--sslAllowInvalidHostnames Allow server certificates to provide
non-matching hostnames
--sslAllowInvalidCertificates allow connections to servers with
invalid certificates
--sslFIPSMode activate FIPS - mode at startup Storage options:
--storageEngine arg what storage engine to use - defaults
to wiredTiger if no data files present
--dbpath arg directory for datafiles - defaults to
/data/db
--directoryperdb each database will be stored in a
separate directory
--noprealloc disable data file preallocation - will
often hurt performance
--nssize arg (=) .ns file size (in MB) for new databases
--quota limits each database to a certain
number of files ( default)
--quotaFiles arg number of files allowed per db, implies
--quota
--smallfiles use a smaller default file size
--syncdelay arg (=) seconds between disk syncs (=never,
but not recommended)
--upgrade upgrade db if needed
--repair run repair on all dbs
--repairpath arg root directory for repair files -
defaults to dbpath
--journal enable journaling
--nojournal disable journaling (journaling is on by
default for bit)
--journalOptions arg journal diagnostic options
--journalCommitInterval arg how often to group/batch commit (ms) WiredTiger options:
--wiredTigerCacheSizeGB arg maximum amount of memory to allocate
for cache; defaults to / of physical
RAM
--wiredTigerStatisticsLogDelaySecs arg (=)
seconds to wait between each write to a
statistics file in the dbpath; means
do not log statistics
--wiredTigerJournalCompressor arg (=snappy)
use a compressor for log records
[none|snappy|zlib]
--wiredTigerDirectoryForIndexes Put indexes and data in different
directories
--wiredTigerCollectionBlockCompressor arg (=snappy)
block compression algorithm for
collection data [none|snappy|zlib]
--wiredTigerIndexPrefixCompression arg (=)
use prefix compression on row-store
leaf pages root@zhouls-virtual-machine:/usr/local/mongodb/bin#
找到参数
--fork
--dbpath arg
--logpath arg
--nohttpinterface
启动 MongoDB数据库
使用下列命令启动 mongod 进程。
sudo service mongod start
或者
启动数据库（推荐）
./mongod --dbpath=/usr/local/mongodb/data/ --fork --logpath=/usr/local/mongodb/log
--dbpath=/usr/local/mongodb/data/ 用于指定存放的mongodb数据库
--fork 是后台执行，不然一直在前台
--logpath=/usr/local/mongodb/log用于指定mongodb的日志记录文件
mongodb启动时报错ERROR: child process failed, exited with error number 1
检查 MongoDB 是否成功启动
通过检查 /var/log/mongodb/mongod.log 文件来确定 mongod 进程是否已经成功启动。
或者查看进程
ps -ef | grep mongod
root@zhouls-virtual-machine:~# ps -ef | grep mongod
root : ? :: ./mongod --dbpath=/usr/local/mongodb/data/ --fork --logpath=/usr/local/mongodb/log
root : pts/ :: grep --color=auto mongod
root@zhouls-virtual-machine:~#
启动后即可通过mongo命令进入数据库
如果大家按照上面的步骤来，安装之后，还是出现这样的情况的话，则那么直接，用apt install mongodb-clients吧。
停止 MongoDB
sudo service mongod stop
重新启动 MongoDB
sudo service mongod restart