/etc/systemd/system.conf
[root@bogon ~]# vi /etc/systemd/system.conf
[root@bogon ~]# cat /etc/systemd/system.conf

This file is part of systemd.

systemd is free software; you can redistribute it and/or modify it

under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation; either version 2.1 of the License, or

(at your option) any later version.

Entries in this file show the compile time defaults.

You can change settings by editing this file.

Defaults can be restored by simply deleting this file.

See systemd-system.conf(5) for details.

[Manager]

LogLevel=info

LogTarget=journal-or-kmsg

LogColor=yes

LogLocation=no

DumpCore=yes

CrashShell=no

ShowStatus=yes

CrashChVT=1

CPUAffinity=1 2

JoinControllers=cpu,cpuacct net_cls,net_prio

RuntimeWatchdogSec=0

ShutdownWatchdogSec=10min

CapabilityBoundingSet=

SystemCallArchitectures=

TimerSlackNSec=

DefaultTimerAccuracySec=1min

DefaultStandardOutput=journal

DefaultStandardError=inherit

DefaultTimeoutStartSec=90s

DefaultTimeoutStopSec=90s

DefaultRestartSec=100ms

DefaultStartLimitInterval=10s

DefaultStartLimitBurst=5

DefaultEnvironment=

DefaultCPUAccounting=no

DefaultBlockIOAccounting=no

DefaultMemoryAccounting=no

DefaultLimitCPU=

DefaultLimitFSIZE=

DefaultLimitDATA=

DefaultLimitSTACK=

DefaultLimitCORE=

DefaultLimitRSS=

DefaultLimitNOFILE=

DefaultLimitNOFILE=1024000 #這裡需要修改

DefaultLimitAS=

DefaultLimitNPROC=

DefaultLimitNPROC=1024000 #這裡也需要修改

DefaultLimitMEMLOCK=

DefaultLimitLOCKS=

DefaultLimitSIGPENDING=

DefaultLimitMSGQUEUE=

DefaultLimitNICE=

DefaultLimitRTPRIO=

DefaultLimitRTTIME=

[root@bogon ~]# ulimit -a #修改之後沒有重啟
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 3791
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024 #還是預設值1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 3791
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
[root@bogon ~]# reboot
Connection to 192.168.1.107 closed by remote host.
Connection to 192.168.1.107 closed.
root@BP:~# ssh 192.168.1.107 #我使用的是金鑰登入，所以不用再輸入密碼
Last login: Mon Jun 26 15:38:21 2017 from 192.168.1.100
u[root@bogon ~]# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 3791
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024000 #重啟後生效了
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 1024000
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
[root@bogon ~]#

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作者：標配的小號
來源：CSDN
原文：https://blog.csdn.net/qq_34829953/article/details/73769973
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