Linux View System Information command

TOP2

#cat /proc/version # to view the kernel

# cat /etc/issue # Check the operating system version

# head -n 1 /etc/issue # Check the OS version

# cat /proc/cpuinfo # View CPU information

# hostname # View the computer name

# lspci -tv # Lists all PCI devices

# lsusb -tv # List all USB devices

# lsmod # Lists the loaded kernel modules

# env # View environment variable resources

# free -m # View memory usage and swap area usage

# df -h # View the usage of each partition

# du -sh <目录名> # to check the size of the specified directory

# grep MemTotal /proc/meminfo # Check the total amount of memory

# grep MemFree /proc/meminfo # Check the amount of free memory

# uptime # View the system running time, number of users, and load

# cat /proc/loadavg # View the system load disks and partitions

# mount | column -t # to check the status of the partition that is hooked

# fdisk -l # View all partitions

# swapon -s # View all swap partitions

# hdparm -i /dev/hda # View disk parameters (only for IDE devices)

# dmesg | grep IDE # View the IDE device detection status at startup time

# ifconfig # View the properties of all network interfaces

# iptables -L # View firewall settings

# route -n # View the route table

# netstat -lntp # View all listening ports

# netstat -antp # to see all the connections that have been made

# netstat -s # View network statistics process

# ps -ef # See all processes

# top # Real-time display of process status for users

# w # View active users

# id <用户名> # View the specified user information

# last # View user login logins

# 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 for the current user

# chkconfig –list # Lists all system services

# chkconfig –list | grep on # lists all system services that have been started

# rpm -qa # View all installed packages

cat /proc/cpuinfo: View CPU parameters

cat /proc/partitions: View hard disks and partitions

cat /proc/meminfo: View memory information

cat /proc/version: View the version, similar to uname -r

cat /proc/ioports: View the IO port of the device

cat /proc/interrupts: View interrupts

cat /proc/pci: View the information of the PCI device

cat /proc/swaps: View information about all swap partitions