下载地址：http://www.mongodb.org/downloads
解压命令：tar zxf mongodb-linux-i686-2.6.0.tgz
存放目录：/usr/local/mongodb
数据目录：/mongodb/data/
日志文件：/mongodb/dblogs
没有具体的安装步骤，解压到存放目录就好了。
mongodb的bin目录下添加数据和日志存放路径：./mongod --dbpath=/usr/local/mongodb/data/ --logpath=/usr/local/mongodb/dblogs --fork
pkill mongod 杀掉mongod进程，不能用kill -9杀掉mongod进程,否则就不能再启动
或者killall mongod
命令：
login as: root
root@10.187.50.3's password:
[root@localhost ~]# cd /home/xyz/Desktop
[root@localhost Desktop]# ls
mongodb-linux-i686-2.6.0 mongodb-linux-i686-2.6.0.tgz vsftpd.rpm
[root@localhost Desktop]# cd mongodb-linux-i686-2.6.0
[root@localhost mongodb-linux-i686-2.6.0]# ls
bin GNU-AGPL-3.0 README THIRD-PARTY-NOTICES
[root@localhost mongodb-linux-i686-2.6.0]# rsync -a bin /usr/local/mongodb
[root@localhost mongodb-linux-i686-2.6.0]# cd /usr/local/
[root@localhost local]# ls
bin etc games include lib libexec mongodb sbin share src
[root@localhost local]# cd mongodb
[root@localhost mongodb]# ls
bin
[root@localhost mongodb]# cd bin
[root@localhost bin]# ls
bsondump mongodump mongoimport mongorestore mongotop
mongo mongoexport mongooplog mongos
mongod mongofiles mongoperf mongostat
[root@localhost bin]# cd ../
[root@localhost mongodb]# ls
bin
[root@localhost mongodb]# mkdir data
[root@localhost mongodb]# touch dblogs
[root@localhost mongodb]# ls
bin data dblogs
[root@localhost mongodb]# cd bin/
[root@localhost bin]# ls
bsondump mongodump mongoimport mongorestore mongotop
mongo mongoexport mongooplog mongos
mongod mongofiles mongoperf mongostat
[root@localhost bin]# ./mongod --dbpath=/usr/local/mongodb/data/ --logpath=/usr/local/mongodb/dblogs --fork
2014-04-27T08:06:43.480+0800
2014-04-27T08:06:43.480+0800 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.
2014-04-27T08:06:43.480+0800
about to fork child process, waiting until server is ready for connections.
forked process: 4489
child process started successfully, parent exiting
[root@localhost bin]# pstree -p | grep mongod
|-mongod(4489)-+-{mongod}(4490)
| |-{mongod}(4491)
| |-{mongod}(4492)
| |-{mongod}(4493)
| |-{mongod}(4494)
| |-{mongod}(4495)
| |-{mongod}(4496)
| |-{mongod}(4497)
| `-{mongod}(4498)
[root@localhost bin]# vi /etc/rc.local
[root@localhost bin]# cat /etc/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
touch /var/lock/subsys/local
/usr/local/mongodb/bin/mongod --dbpath=/usr/local/mongodb/data/ --logpath=/usr/local/mongodb/dblogs --fork
[root@localhost bin]# ps -ef | grep mongod
root 4489 1 0 08:06 ? 00:00:03 ./mongod --dbpath=/usr/local/mongodb/data/ --logpath=/usr/local/mongodb/dblogs --fork
root 18469 4413 0 08:15 pts/1 00:00:00 grep mongod
[root@localhost bin]# kill -9 4489
[root@localhost bin]# ps -ef | grep mongod
root 18474 4413 0 08:16 pts/1 00:00:00 grep mongod
[root@localhost bin]# ./mongod --dbpath=/usr/local/mongodb/data/ --logpath=/usr/local/mongodb/dblogs --fork
2014-04-27T08:16:24.524+0800
2014-04-27T08:16:24.524+0800 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.
2014-04-27T08:16:24.524+0800
about to fork child process, waiting until server is ready for connections.
forked process: 18478
ERROR: child process failed, exited with error number 100
[root@localhost bin]# ps -ef | grep mongod root 18483 4413 0 08:16 pts/1 00:00:00 grep mongod
[root@localhost bin]# cd ../
[root@localhost mongodb]# cd data/
[root@localhost data]# ls
local.0 local.ns mongod.lock _tmp
[root@localhost data]# rm -rf mongod.lock
[root@localhost data]# cd ../
[root@localhost mongodb]# cd bin
[root@localhost bin]# ./mongod --dbpath=/usr/local/mongodb/data/ --logpath=/usr/local/mongodb/dblogs --fork
2014-04-27T08:18:31.190+0800
2014-04-27T08:18:31.190+0800 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.
2014-04-27T08:18:31.190+0800
about to fork child process, waiting until server is ready for connections.
forked process: 18493
child process started successfully, parent exiting
[root@localhost bin]# ps -ef | grep mongod root 18493 1 0 08:18 ? 00:00:00 ./mongod --dbpath=/usr/local/mongodb/data/ --logpath=/usr/local/mongodb/dblogs --fork
root 18505 4413 0 08:18 pts/1 00:00:00 grep mongod
[root@localhost bin]#