Linux system parameters adjustment

In Linux, adjust the parameters to modify the system core parameters and modify the/etc/sysctl. conf file. Add the following lines to the file and add the lines to the file. The lines will take effect after the system restarts, or use/sbin/sysctl-p to take effect. Kernel. sem = 250 32000 100. net. core. rmem_default = 262144net. core. rmem_max = 262144net. core. wmem_default = 262144net. core. wmem_max = 262144kernel. core_uses_pid = 0 [description] www.2cto.com sem: indicates the set semaphore, which has four values (semmsl, semmns, semopm, semmni ). Net. core. rmem_default: the default buffer size. Net. core. rmem_max: maximum value of the received buffer. Net. core. wmem_default: the size of the buffer sent by default. Net. core. wmem_max: Maximum sending buffer value. Kernel. core_uses_pid: indicates whether the generated core File Name Is suffixed with the process id. You can use/sbin/sysctl-a | grep shmmni to check that the parameters after restart meet the requirements. Modify user limits/etc/security/limits. conf # maximum number of files allowed to be opened *-nofile 65535 # maximum number of processes allowed to be created *-Add the configuration in nproc 65535 pam for the configuration to take effect/etc/pam. d/login Add a configuration line: session required pam_limits.so www.2cto.com disable the firewall through the setup graphical interface configuration, disable the firewall. Disable SELinux to modify the configuration file/etc/sysconfig/selinux, set SELINUX to disable, and restart the machine to make it take effect. Check that the IP configuration defaults to the 127.0.0.1 address corresponding to the host name. Add a nic ip address and host name ing relationship 127.0.0.1 apptest localhost. localdomain localhost to delete the Host Name: 1 localhost6.localdomain6 localhost6 author Lotus 302