安装:
# yum -y install policycoreutils-python
semanage port -a -t ssh_port_t -p tcp 1761
semanage port -l | grep ssh
netstat -tlp
iptables -L
yum provides man
find / -name nagios
查看用户:cat /etc/passwd
查看组:cat /etc/group
cat /etc/group | awk -F: '{print $1}'