Collection of common VPS commands

System
# uname -a # View kernel/operating system/CPU information
# head -n 1 /etc/issue # Check the 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
Resources
# free -m # Check memory usage and swap area usage
# df -h # Check the usage of each partition
# du -sh # Check the size of the specified directory
# grep MemTotal /proc/meminfo # Check the total memory
# grep MemFree /proc/meminfo # Check the amount of free memory
# uptime # View system running time, number of users, load
# cat /proc/loadavg # View system load
Disks and Partitions
# mount | column -t # Check the mounted partition status
# 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 # Check the IDE device detection status at startup
Network
# ifconfig # View the properties of all network interfaces
# iptables -L # View firewall settings
# route -n # View routing table
# 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
# w # View active users
# id # View specified user information
# last # View user login log
# 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 current user’s scheduled tasks
Service
# chkconfig –list # List all system services
# chkconfig –list | grep on # List all started system services
Program
# rpm -qa # View all installed software packages

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