centos7常用命令

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# 修改hostname
vim /etc/sysconfig/network
HOSTNAME=node1 # 修改为node1
# 同时
hostnamectl set-hostname node1

# 再手动更新 hosts
vim /etc/hosts

ll /proc/${pid}
查看 ${pid} 的进程信息，包括启动路径等

#TCP连接的情况
netstat -n | grep ":80" | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'

# 修改记录
vim /etc/sysctl.conf

net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_tw_buckets=100000
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_tw_timeout = 3

# 保存
/sbin/sysctl -p

转载于:https://my.oschina.net/corleone/blog/1857711