Summary of commands for viewing various devices and resources in Ubuntu

First, System Information

1. View kernel information: $uname-A
2. View operating system version: $head-n 1/etc/issue
3. View CPU information: $cat/proc/cpuinfo
4. View computer Name: $hostname
5. List all PCI device information: $LSPCI-TV
6. List all USB device information: $lsusb-TV
7. List the system-loaded module information: $lsmod
Second, the use of system resources
1. View memory and Swap partition usage: $free-M
2. View the usage of the hard disk partition: $DF-H
3. View the size of a directory: $du-sh< directory >
4. View the total amount of memory and the amount of free storage: $grep Memtotal/proc/meminfo
$grep Memfree/proc/meminfo
5. View system uptime, number of users, and load: $uptime
6. View system load: $cat/proc/loadavg
Third, hard disk and partition information
1. View mount partition information: $mount |column-t
2. View hard disk partition information: $sudo fdisk-l
3. View all swap partition information: $swapon-S
4. View hard Drive parameter information: $sudo hdparm-i/dev/had
Iv. Network Information
1. View network interface information: $ifconfig
2. View firewall settings information: $iptables-L
3. View the routing table information: $route-N
4. View information for all listening ports: $netstat-LNTP
5. View information for all established connections: $netstat-ANTP
6. View network statistics Information: $netstat-S
V. Viewing information about a system process
1. View information for all processes: $ps-ef
2. View information about the current process: $top
Vi. viewing information about the user
1. View information about the current activity: $w or $who
2. View the information for the specified user: $id < user name >
3. View user logon log: $last
4. View the current user's scheduled tasks: $crontab-L
Vii. View the installation package information: $dpkg-l< software name >

Summary of commands for viewing various devices and resources in Ubuntu