Linux limits.conf configuration __linux

The limits.conf file is actually a pam_limits.so configuration file in Linux PAM (plug-in authentication module, pluggable authentication Modules), and only pins for a single session. The limits.conf format is as follows: username| @groupname  type Resource limit username| @groupname: Set the user name that needs to be restricted, the group name is preceded by @ and the user name is distinguished. 　　You can also use the wildcard character * to make all user restrictions. Type: There are Soft,hard and-,soft that refer to the setting value that the current system is in effect. The hard indicates the maximum value that can be set in the system. The soft limit cannot be higher than the Har limit. 　　Use-Indicates that both soft and hard values are set. 　　Resource:core-Limit kernel file size date-Maximum data size fsize-Maximum file size Memlock-Maximum locked memory address space Nofile-Maximum number of open files RSS-Maximum persistent setting size Stack-Maximum stack size CPU-MAX CPU time in minutes Noproc-maximum number of processes as-address space limit Maxlogins-the maximum number of users allowed to log in to make limits.conf files match In effect, you must make sure that the pam_limits.so file is added to the startup file. View/etc/pam.d/login files include: Session required/lib/security/pam_limits.so   For example: Modify file descriptor Size (65536) vi  /etc/ security/limits.conf   *                                 soft    nofile  65536 *                                hard     nofile  65536