[游戏开发]linux 精简存储

删除旧版本内核

 uname     
      -s, --kernel-name
      -r, --kernel-release

[root@paly ~]#uname -r
2.6.32-754.35.1.el6.i686
[root@paly ~]#rpm -qa | grep kernel*    
dracut-kernel-004-411.el6.noarch
kernel-firmware-2.6.32-754.35.1.el6.noarch
kernel-2.6.32-754.35.1.el6.i686
kernel-headers-2.6.32-754.35.1.el6.i686
kernel-2.6.32-754.27.1.el6.i686
[root@paly ~]#yum remove kernel-2.6.32-754.27.1.el6.i686
Loaded plugins: fastestmirror
Setting up Remove Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.
The program yum-complete-transaction is found in the yum-utils package.
--> Running transaction check
---> Package kernel.i686 0:2.6.32-754.27.1.el6 will be erased
--> Finished Dependency Resolution

Dependencies Resolved

======================================================================================================================================================
 Package                         Arch                          Version                                        Repository                         Size
======================================================================================================================================================
Removing:
 kernel                          i686                          2.6.32-754.27.1.el6                            @updates                           97 M

Transaction Summary
======================================================================================================================================================
Remove        1 Package(s)

Installed size: 97 M
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Repository base is listed more than once in the configuration
  Erasing    : kernel-2.6.32-754.27.1.el6.i686                                                                                                    1/1 
warning:    erase unlink of /lib/modules/2.6.32-754.27.1.el6.i686/modules.order failed: No such file or directory
warning:    erase unlink of /lib/modules/2.6.32-754.27.1.el6.i686/modules.networking failed: No such file or directory
warning:    erase unlink of /lib/modules/2.6.32-754.27.1.el6.i686/modules.modesetting failed: No such file or directory
warning:    erase unlink of /lib/modules/2.6.32-754.27.1.el6.i686/modules.drm failed: No such file or directory
warning:    erase unlink of /lib/modules/2.6.32-754.27.1.el6.i686/modules.block failed: No such file or directory
  Verifying  : kernel-2.6.32-754.27.1.el6.i686                                                                                                    1/1 

Removed:
  kernel.i686 0:2.6.32-754.27.1.el6                                                                                                                   

Complete!
[root@paly ~]#rpm -qa | grep kernel*                    
dracut-kernel-004-411.el6.noarch
kernel-firmware-2.6.32-754.35.1.el6.noarch
kernel-2.6.32-754.35.1.el6.i686
kernel-headers-2.6.32-754.35.1.el6.i686
[root@paly ~]#

查看存储情况

[root@paly /]#df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_ton-lv_root
                       19G  8.8G  8.5G  51% /
tmpfs                 249M     0  249M   0% /dev/shm
/dev/sda1             477M   29M  423M   7% /boot
/dev/sda5             988M  161M  775M  18% /mnt/test

[root@paly /]# du -sh * | sort 
du: cannot read directory `home/test/public': No such file or directory
du: cannot read directory `misc/cd': No such file or directory
du: cannot access `proc/23485/task/23485/fd/4': No such file or directory
du: cannot access `proc/23485/task/23485/fdinfo/4': No such file or directory
du: cannot access `proc/23485/fd/4': No such file or directory
du: cannot access `proc/23485/fdinfo/4': No such file or directory
0       misc
0       net
0       proc
0       sys
13M     sbin
168K    dev
16K     lost+found
181M    mnt								#挂载文件
192M    lib
20K     tmp
2.4G    root								#根用户数据	
2.5G    home                           #用户数据
27M     boot
29M     etc								#配置文件
3.1G    usr								#程序文件
4.0K    cgroup
4.0K    media
4.0K    opt
4.0K    selinux
4.0K    srv
569M    var								#日志及临时文件
7.6M    bin
[root@paly /]#

[root@paly ~]#pwd
/root
[root@paly ~]#du -h --max-depth=1							#这里查看root为啥这么大，du看当前一级目录的使用情况
16K     ./.cmake
8.0K    ./.vim-fuf-data
8.0K    ./.lftp
4.0K    ./Mail
108K    ./.cache
4.0K    ./backup
12K     ./root
289M    ./php-5.5.10
1.1M    ./linux-0.11
1.9G    ./mysql-5.6.49
41M     ./busybox-1.20.2
4.0K    ./git
16K     ./.ssh
37M     ./.vim
12K     ./.config
20K     ./code_C++
8.0K    ./.pki
134M    ./test
2.4G    .
[root@paly ~]#

这里可以看到当年编译留下的php及mysql安装包很占内存，由于是安装包删除，记录好对应版本就可以删除了。

清除缓存

#清除buffer
[root@paly ~]#echo 1 > /proc/sys/vm/drop_caches

处理日志

待写