Initial knowledge of the CentOS Service command Daquan

(1) System Architecture

View Kernel

Shell Code

1. # Uname-s-R
2. Linux 2.6. 32-358.el6.x86_64

View Release version

Shell Code

1. # Cat/etc/redhat-release
2. CentOS Release 6.4 (Final)

View CPU Architecture

Shell Code

1. # Arch
2. x86_64 (x86_64 means 64-bit machine/i686 represents 32-bit machine)
3. # getconf Long_bit
4. -

(2) User Settings

Add user

Shell Code

1. #/usr/sbin/useradd user1-d/home/user1-g Nobody
2. # passwd User1
3. New Password: 123456
4. Retype new password: 123456
5. Passwd:all authentication tokens updated successfully.

Confirm User

Shell Code

1. # ID User1

Delete User

Shell Code

1. # Userdel-r User1

Give root permission

Shell Code

1. # Usermod-g Wheel Hoge
2. # VI/ETC/PAM.D/SU
3. Auth Required pam_wheel.so Use_uid # <= Uncomment

User List

Shell Code

1. # CAT/ETC/PASSWD

(3) network Settings

Set IP

Shell Code

2. # Vi/etc/sysconfig/network-scripts/ifcfg-eth0
4. device="Eth0"
6. otproto="Static" # <=
8. Hwaddr="00:0c:29:53:a5:ae"
10. ipv6init="No" # <=
12. nm_controlled="Yes"
14. onboot="Yes"
16. Type="Ethernet"
18. uuid="1ca6acf4-ebce-415a-a89b-bf89a67819ff"
20. Ipaddr="xxx.xxx.xx.xx" # <=
22. netmask="255.255.255.0" # <=
24. gateway="xxx.xxx.xx.xx" # <=
26. dns1="xxx.xxx.xx.xx" # <=
30. # Service Network Restart
32. Shutting down interface eth0:
34. ......
36. Connection activated [OK]
40. # ifconfig
42. Eth0 Link encap:ethernet HWaddr 00:0c:29:2f:d5:
44. inet addr:xxx.xxx.xx.xx Bcast:xxx.xxx.xx.xx Mask:255.255. 255.0
46. ......

Uninstalling the Nestworkmanager service

Shell Code

1. # chkconfig NetworkManager off
2. # yum-y Remove NetworkManager

Close IPv6

Shell Code

1. # service ip6tables stop  
2. # chkconfig  ip6tables off  
3. # echo  Install ipv6 /bin/true "&NBSP;>>&NBSP;/ETC/MODPROBE.D/DISABLE-IPV6.CONF&NBSP;&NBSP;
4. # vi /etc/ sysconfig/network  
5.   networking_ipv6=no  
6.   ipv6init= no  
7. # vi /etc/sysconfig/network-scripts/ifcfg-eth0  
8. #  shutdown -r now  
9. # lsmod | grep ipv6   
10.    no IPv6 module   
11. # netstat -an | grep ffff  
12.    not: FFFF: start of ip  
13. # ifconfig  
14.    No inet6 addr start text   

(4) package management settings

Yum cleanup

Shell Code

1. # Yum Clean All
2. Loaded Plugins:fastestmirror, security
3. Cleaning Repos:base Extras Updates
4. Cleaning up everything
5. # yum Makecache
6. Loaded Plugins:fastestmirror, security
7. Determining fastest Mirrors
8. .............
9. Metadata Cache Created

Yum Update

Shell Code

1. # yum-y Update

Automatic Updates

Shell Code

1. # yum-y Install Yum-cron
2. # Vi/etc/sysconfig/yum-cron
3. Check_only=yes
4. Download_only=yes
5. #/etc/rc.d/init.d/yum-cron Start
6. # Chkconfig Yum-cron on
7. # chkconfig--list Yum-cron

Automatically find the fastest image

Shell Code

1. # yum-y Install Yum-plugin-fastestmirror
2. # vi/etc/yum/pluginconf.d/fastestmirror.conf
3. enabled=0←0: Invalid 1: valid

Add Repository

Shell Code

2. # Vi/etc/yum.repos.d/centos-base.repo
6. # RPM-UVH http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5. 3-1.el6.rf.x86_64.rpm
8. # Vi/etc/yum.repos.d/rpmforge.repo
10. enabled=0
12. # Yum--enablerepo=rpmforge install xxxx
16. # RPM-UVH http://ftp.riken.jp/Linux/fedora/epel/6/x86_64/epel-release-6-8.noarch.rpm
18. # Vi/etc/yum.repos.d/epel.repo
20. enabled=0
22. # Yum--enablerepo=epel install xxxx

(5) Setting vim

Shell Code

1. # yum-y Install vim-enhanced
2. # Vi/etc/profile
3. Alias vi=' vim '
4. # Source/etc/profile
5. # VI/ETC/VIMRC

(6) Security Settings

Turn off SELinux

Shell Code

1. # Getenforce
2. # Setenforce 0← temporarily closed
3. # Vi/etc/sysconfig/selinux
4. Selinux=enforcing
5. ↓
6. Selinux=disabled

Stop Iptables

Shell Code

2. #/etc/rc.d/init.d/iptables Stop
4. iptables:flushing firewall rules: [OK]
6. Iptables:setting chains to Policy Accept:filter [OK]
8. iptables:unloading modules: [OK]
10. # chkconfig Iptables off
12. # chkconfig--list iptables
14. Iptables 0:off 1:off 2:off 3:off 4:off 5:off 6:off

(7) operation of the system

Disk usage

Shell Code

1. # df-h
3. # yum-y Install Sysstat
4. # Iostat

Memory usage

Shell Code

1. # free-m

CPU and memory

Shell Code

1. # Cat/proc/cpuinfo
2. # Cat/proc/meminfo

(8) Other

Native language

Shell Code

1. # yum-y Groupinstall "Japanese support"
2. # vi/etc/sysconfig/i18n
3. lang="en_US. UTF-8 "
4. ↓
5. lang="JA_JP. UTF-8 "
6. # source/etc/sysconfig/i18n
7. # echo $LANG
8. Ja_jp. utf-8
9. # Shutdown-r Now

Stop unnecessary services

Shell Code

1. # chkconfig--list | grep 3:on
2. # Service Ip6tables Stop
3. # chkconfig Ip6tables off

Encoding conversion NKF (Network Kanji Filter)

Shell Code

1. # yum-y Install NKF
2. # VI Readme.txt
3. Test
4. Kanji
5. # nkf-g Readme.txt
6. utf-8 (LF)
7. # nkf-s--overwrite Readme.txt
8. # nkf-g Readme.txt
9. Shift_JIS (LF)
10. # nkf-j--overwrite Readme.txt
11. # nkf-g Readme.txt
12. iso-2022-jp (LF)

Installing GCC

Shell Code

1. # Rpm-qa GCC
2. # yum-y Install gcc gcc-c++
3. # gcc-v
4. Using built-in specs.
5. Target:i686-redhat-linux
6. ............
7. GCC version 4.4. 7 20120313 (Red Hat 4.4. 7-4) (GCC)

Installing Pcre

Shell Code

2. # CD/USR/LOCAL/SRC
4. # wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.35.tar.gz
6. # tar zxvf pcre-8.35.tar.gz
8. # cd/usr/local/src/pcre-8.35
10. #./configure--prefix=/usr/local/pcre/8.35
12. # Make Clean
14. # Make && make install
16. # path=/usr/local/pcre/8.35/bin: $PATH
18. # vi/etc/ld.so.conf
20. /usr/local/pcre/8.35/lib← End Append
22. # Ldconfig
24. # Rpm-qa Pcre
26. pcre-7.8-6.el6.x86_64
28. # pcretest-c
30. PCRE version 7.8 2008-09-

Installing OpenSSL

Shell Code

2. # CD/USR/LOCAL/SRC
4. # wget http://www.openssl.org/source/openssl-1.0.1h.tar.gz
6. # tar xzvf openssl-1.0.1h.tar.gz
8. # CD openssl-1.0.1h
10. #./config Shared-fpic
12. # Make && make install
14. # vi/etc/ld.so.conf
16. /usr/local/ssl/lib← End Append
18. # Ldconfig
20. # ldconfig-f/etc/ld.so.conf-vp|grep Ssl/lib
22. Libssl.so. 1.0.0 (LIBC6) =/usr/local/ssl/lib/libssl.so. 1.0.0
24. Libssl.so (LIBC6) =/usr/local/ssl/lib/libssl.so
26. Libcrypto.so. 1.0.0 (LIBC6) =/usr/local/ssl/lib/libcrypto.so. 1.0.0
28. Libcrypto.so (LIBC6) =/usr/local/ssl/lib/libcrypto.so
30. #/USR/LOCAL/SSL/BIN/OPENSSL Version
32. OpenSSL 1.0.1h 5 June

NTP sync time

Reference # Yum-y Install NTP
# mv/etc/ntp.conf/etc/ntp.conf.org
# vi/etc/ntp.conf
Driftfile/var/lib/ntp/drift
Server 0.jp.pool.ntp.org
Server 1.jp.pool.ntp.org
Server 2.jp.pool.ntp.org
Server 3.jp.pool.ntp.org
# ntpdate 0.jp.pool.ntp.org
#/ETC/INIT.D/NTPD Start
# ntpq-p
# Ntpstatshell Code

1. # Yum Update glibc
2. # Rpm-qa | grep glibc
3. 2.12-1.149.el6_6. 5

Initial knowledge of the CentOS Service command Daquan