The basic optimization mode of Linux
This article mainly explains "the basic optimization method of Linux". The explanation content in this article is simple and clear, easy to learn and understand. Please follow the ideas of Xiaobian and go deep into it slowly to study and learn "the basic optimization method of Linux" together.
It boils down to:
One clear, one fine, one increase, two excellent, four set, seven others
A clear: regularly clean logs/var/spool/clientsqueue
One essence: streamline boot service
Increase: Increase file descriptor
Two excellent: linux kernel parameter optimization, yum source optimization
Four settings: set the character set of the system, set the ssh login limit, set the boot prompt information and kernel information, and set the block size.
Seven others: file system optimization, sync data synchronous writing to disk, do not update timestamp, lock system critical files, time synchronization, sudo centralized management, turn off firewall and selinux
1. sync data synchronous writing to disk
async sync
2. Do not update timestamp
noatime
3. File system optimization: disable ext3, ext4 log function
Disabled for less data-critical services
4. Set the block size, usually 4K
mkfs -t ext3 -b 4096 /dev/sda1
5. Lock down key files of the system
chattr +/-i /etc/passwd
6.Linux kernel tuning (parameter tuning)
…………
7. Set boot prompt information and system information
/etc/motd /etc/issue
8. Set up yum sources for the system and upgrade
/etc/yum.repos.d/
9. Time synchronization; between 50-100 servers can be set up time synchronization server ntpserver
/usr/sbin/ntpdate time.windows.com
10. Set the character set of the system
/etc/sysconfig/i18n
11. Use sudo tools to centralize user management
visudo
12. Limit ssh login settings, such as changing ports, prohibiting root logins, prohibiting password-less logins, and so on.
/etc/ssh/sshd.conf
13. Enlarge file descriptor
echo '* - nofile 65535 ' >>/etc/security/limits.conf
14. The requested URL/var/spool/clientsqueak/was not found on this server.
Write scripts, put them in timed tasks, and clean them up regularly.
15. Streamlined boot service
a) setup, check the startup service
b) Terminal input ntsysv
c) Scripting
cat /server/scripts/chkinfo.sh
#setup sys start server or process
for i in `chkconfig --list |grep 3:on|awk '{print $1}'`;do chkconfig --level 3 $i off;done
/bin/sh /server/scripts/chkinfo.sh
Thank you for reading, the above is the "basic optimization of Linux" content, after the study of this article, I believe that everyone has a deeper understanding of the basic optimization of Linux, the specific use of the situation also needs to be verified. Here is, Xiaobian will push more articles related to knowledge points for everyone, welcome to pay attention!
