修改centos打开文件最大限制

1. /etc/security/limits.conf

# /etc/security/limits.conf##Each line describes a limit for a user in the form:##<domain>        <type>  <item>  <value>##Where:#<domain> can be:#        - an user name#        - a group name, with @group syntax#        - the wildcard *, for default entry#        - the wildcard %, can be also used with %group syntax,#                 for maxlogin limit##<type> can have the two values:#        - "soft" for enforcing the soft limits#        - "hard" for enforcing hard limits##<item> can be one of the following:#        - core - limits the core file size (KB)#        - data - max data size (KB)#        - fsize - maximum filesize (KB)#        - memlock - max locked-in-memory address space (KB)#        - nofile - max number of open files#        - rss - max resident set size (KB)#        - stack - max stack size (KB)#        - cpu - max CPU time (MIN)#        - nproc - max number of processes#        - as - address space limit#        - maxlogins - max number of logins for this user#        - maxsyslogins - max number of logins on the system#        - priority - the priority to run user process with#        - locks - max number of file locks the user can hold#        - sigpending - max number of pending signals#        - msgqueue - max memory used by POSIX message queues (bytes)#        - nice - max nice priority allowed to raise to#        - rtprio - max realtime priority##<domain>      <type>  <item>         <value>##*               soft    core            0#*               hard    rss             10000#@student        hard    nproc           20#@faculty        soft    nproc           20#@faculty        hard    nproc           50#ftp             hard    nproc           0#@student        -       maxlogins       4*               -       nofile           8192# End of file

修改后重启主机即可生效。