Linux系统中最大文件、进程打开数修改

最新推荐文章于 2024-04-16 05:19:26 发布

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这篇博客介绍了如何通过bash脚本修改Linux系统中/etc/security/limits.conf文件，将最大文件打开数（nofile）和最大进程数（nproc）设置为65535，以提高系统性能。脚本首先备份原有配置，然后检查并替换相应的软限制和硬限制。

最大文件打开数修改：

#!/bin/bash
a=`cat /etc/security/limits.conf|grep "nofile"|tail -n 2`
b=`echo $a |grep ^#`
if [ -f /etc/security/limits.conf ]; then 
	cp /etc/security/limits.conf /etc/security/limits.conf.bak
	if [ ! -z "$a" ];then
                if [ -z "$b" ];then
                        c=`cat /etc/security/limits.conf|grep "nofile"|tail -n 1|awk -F " " '{print $4}'`
                        sed -i "s/soft nofile $c/soft nofile 65535/g" /etc/security/limits.conf
                        sed -i "s/hard nofile $c/hard nofile 65535/g" /etc/security/limits.conf
                else
                        echo "* soft nofile 65535" >> /etc/security/limits.conf
                        echo "* hard nofile 65535" >> /etc/security/limits.conf
                fi
	else
		echo "* soft nofile 65535" >> /etc/security/limits.conf
		echo "* hard nofile 65535" >> /etc/security/limits.conf
	fi			
fi

最大进程打开数修改：

#!/bin/bash
a=`cat /etc/security/limits.conf|grep "nproc"|tail -n 2`
b=`echo $a |grep ^#`
if [ -f /etc/security/limits.conf ]; then 
	cp /etc/security/limits.conf /etc/security/limits.conf.bak
	if [ ! -z "$a" ];then
                if [ -z "$b" ];then
                        c=`cat /etc/security/limits.conf|grep "nproc"|tail -n 1|awk -F " " '{print $4}'`
                        sed -i "s/soft nproc $c/soft nproc 65535/g" /etc/security/limits.conf
                        sed -i "s/hard nproc $c/hard nproc 65535/g" /etc/security/limits.conf
                else
                        echo "* soft nproc 65535" >> /etc/security/limits.conf
                        echo "* hard nproc 65535" >> /etc/security/limits.conf
                fi
	else
		echo "* soft nproc 65535" >> /etc/security/limits.conf
		echo "* hard nproc 65535" >> /etc/security/limits.conf
	fi			
fi