Common Linux commands and linux commands

Common Linux commands and linux commands

Uname-a # view kernel/operating system/CPU Information
Head-n 1/etc/issue # view the operating system version
Cat/proc/cpuinfo # view CPU Information
Hostname # view the computer name
Lspci-TV # list all PCI devices
Lsusb-TV # list all USB devices
Lsmod # list loaded Kernel Modules
Env # view environment variable resources
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 the specified directory
Grep MemTotal/proc/meminfo # view total memory
Grep MemFree/proc/meminfo # view the Amount of idle memory
Uptime # view system running time, number of users, and load

Cat/proc/loadavg # view system load disks and partitions
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 (only applicable to IDE devices)
Dmesg | grep IDE # view the network of IDE Device Detection Status at startup
Ifconfig # view the attributes of all network interfaces
Iptables-L # view firewall settings
Route-n # view the route table
Netstat-lntp # view all listening ports
Netstat-antp # view all established connections
Netstat-s # view network statisticsInformation Process
Ps-ef # view all processes
Top # real-time display of Process status users
W # view active users
Id <User Name> # 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 Task Service of the current user
Chkconfig -- list # list all system services
Chkconfig -- list | grep on # list all started system service programs
Rpm-qa # view all installed software packages