linux常用文件 /etc/redhat-release /etc/hostname /etc/ssh/sshd_config /proc/meminfo /proc/cpuinfo /etc/issue 查看系统版本号 /etc/rc.d/rc.local 自定义开机启动程序 /etc/resolv.conf /etc/syscofig/network 修改主机名 /var/log/messages /etc/sysctl.conf