View System Information in Linux

System # uname-a # view kernel/operating system/CPU information # head-n 1/etc/issue # view operating system version # cat/proc/cpuinfo # view CPU information # hostname # View computer name # lspci-TV # list all PCI devices # lsusb-TV # list all USB devices # lsmod # list loaded kernel modules # env # view environment variables
Resource # free-m # view memory usage and swap zone usage # df-h # view the usage of each partition # du-sh <Directory Name> # view the size of a specified directory # grep MemTotal/ proc/meminfo # view the total memory # grep MemFree/proc/meminfo # view the Amount of idle memory # uptime # view the system running time, number of users, and load # cat/proc/loadavg # view the system load
Disk and partition www.2cto.com # mount | column-t # view the status of the mounted partition # fdisk-l # view all partitions # swapon-s # view all swap partitions # hdparm-I/dev/ hda # view disk parameters (applicable only to IDE devices) # dmesg | grep IDE # view the IDE Device Detection Status at startup
Network # ifconfig # view the attributes of all network interfaces # iptables-L # view firewall settings # route-n # view route tables # netstat-lntp # view all listening ports # netstat-antp # View all established connections # netstat-s # view network statistics
Process # ps-ef # view all processes # top # display Process status in real time
User www.2cto.com # w # view active users # id <username> # view specified user information # last # view User Logon logs # cut-d: -f1/etc/passwd # view all users in the system # cut-d:-f1/etc/group # view all groups in the system # crontab-l # view the scheduled tasks of the current user
Service # chkconfig -- list # list all system services # chkconfig -- list | grep on # list all started system service programs # rpm-qa # view all installed software packages author Huan 168