linux常用命令常用指令
查看系统信息
# uname -a # 查看内核/操作系统/CPU信息 # cat /etc/issue # cat /etc/redhat-release # 查看操作系统版本 # cat /proc/cpuinfo # 查看CPU信息 # hostname # 查看计算机名 # lspci -tv # 列出所有PCI设备 # lsusb -tv # 列出所有USB设备 # lsmod # 列出加载的内核模块 # env # 查看环境变量
查看系统运行资源
# free -m # 查看内存使用量和交换区使用量 # df -h # 查看各分区使用情况 # du -sh <目录名> # 查看指定目录的大小 # grep MemTotal /proc/meminfo # 查看内存总量 # grep MemFree /proc/meminfo # 查看空闲内存量 # uptime # 查看系统运行时间、用户数、负载 # cat /proc/loadavg # 查看系统负载
查看系统磁盘和分区信息
# mount | column -t # 查看挂接的分区状态 # fdisk -l # 查看所有分区 # swapon -s # 查看所有交换分区 # hdparm -i /dev/hda # 查看磁盘参数(仅适用于IDE设备) # dmesg | grep IDE # 查看启动时IDE设备检测状况
查看网络信息
# ifconfig # 查看所有网络接口的属性 # iptables -L # 查看防火墙设置 # route -n # 查看路由表 # netstat -lntp # 查看所有监听端口 # netstat -antp # 查看所有已经建立的连接 # netstat -s # 查看网络统计信息
查看进程
# ps -ef # 查看所有进程 # top # 实时显示进程状态
查看用户信息
# w # 查看活动用户 # id <用户名> # 查看指定用户信息 # last # 查看用户登录日志 # cut -d: -f1 /etc/passwd # 查看系统所有用户 # cut -d: -f1 /etc/group # 查看系统所有组 # crontab -l # 查看当前用户的计划任务
查看服务
# chkconfig –list # 列出所有系统服务 # chkconfig –list | grep on # 列出所有启动的系统服务
文件或者文件名777权限
# chmod 777 -R /文件或者文件名 # 给指定的文件夹或者文件名777权限
mysql开放外网访问权限(123456代表数据库密码)
mysql -u root -p123456 GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION; FLUSH PRIVILEGES; Quit
关闭防火墙
centos7系统 systemctl stop firewalld.service systemctl disable firewalld.service
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软壳源码网 » linux常用命令常用指令
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