linux安装 软件、及内核调整

安装常用软件 yum install -y wget ntpdate pstree gcc vim pciutils irqbalance openssh-server gcc-c++ redhat-lsb

2.升级内核、打补丁

yum update

3.安装iftop(用于网络流量监控)

****CentOS上安装所需依赖包： yum install flex byacc libpcap ncurses ncurses-devel libpcap-devel ****下载iftop wget http://www.ex-parrot.com/~pdw/iftop/download/iftop-0.17.tar.gz cd iftop-0.17 ./configure make && make install

4.内核参数调整

ulimit -n 65535 vim/etc/security/limits.conf * soft nofile 65535 * hard nofile 65535 vim /etc/sysctl.conf net.core.somaxconn = 8000 net.ipv4.tcp_max_syn_backlog = 10240 vm.overcommit_memory = 1