网络设置：
setup设置网络
vi /etc/sysconfig/netwrok-scripts/ifcfg-eth0
删除HWADDR和UUID行
dns：/etc/resolv.conf
linux版本，内核查看
cat /etc/redhat-release
uname -r
uname -m
SELINUX
[root@lufengcentos ~]
[root@lufengcentos ~]
[root@lufengcentos ~]
开机自启动
[root@lufengcentos ~]
[root@lufengcentos ~]
[root@lufengcentos ~]
防火墙
[root@lufengcentos ~]
iptables: Setting chains to policy ACCEPT: filter [ OK ]
iptables: Flushing firewall rules: [ OK ]
iptables: Unloading modules: [ OK ]
中文字符
[root@lufengcentos ~]
LANG="en_US.UTF-8"
SYSFONT="latarcyrheb-sun16"
[root@lufengcentos ~]
[root@lufengcentos ~]
[root@lufengcentos ~]
[root@lufengcentos ~]
时间同步
[root@lufengcentos ~]
[root@lufengcentos ~]
[root@lufengcentos ~]
*/5 * * * * /usr/sbin/ntpdate time.nist.gov
文件描述符设置
[root@lufengcentos ~]
1024
[root@lufengcentos ~]
* - nofile 65535
内核优化
[root@lufengcentos ~]
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_retries2 = 5
net.ipv4.tcp_fin_timeout = 2
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 32768
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_wmem = 8192 131072 16777216
net.ipv4.tcp_rmem = 32768 131072 16777216
net.ipv4.tcp_mem = 786432 1048576 1572864
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.ip_conntrack_max = 65536
net.ipv4.netfilter.ip_conntrack_max=65536
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established=180
net.core.somaxconn = 16384
net.core.netdev_max_backlog = 16384
[root@lufengcentos ~]
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