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This article mainly explains the "centos modification of kernel parameters", the content of the explanation is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "centos modification of kernel parameters" bar!

Sysctl-a displays the kernel parameters available on the current system in centos

Linux can modify kernel parameters in three ways:

(1) modify the / etc/sysctl.conf file, add the configuration option in the format key = value, and then call sysctl-p to load the new configuration after modification and save (this way will not be lost when the system is rebooted)

(2) use sysctl command to modify temporarily, such as sysctl-w kernel.hostname=**** to modify the hostname

(3) modify the files in the / proc/sys directory, such as echo "379008 505344 758016" > / proc/sys/net/ipv4/tcp_mem

Note: the second and third ways will cause the machine to fail after reboot.

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