Linux Common Commands list

Source: Internet
Author: User
Tags dmesg

System

# uname-a # View kernel/Os/cpu information
# head-n 1/etc/issue # view OS 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 of loaded kernel modules
# env # View Environment variables

Resources

# free-m # View memory usage and swap area 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 free memory
# uptime # View System uptime, number of users, load
# cat/proc/loadavg # View System load

Disks and partitions

# Mount | COLUMN-T # Viewing the status of a mounted partition
# fdisk-l # View all partitions
# swapon-s # View all swap partitions
# hdparm-i/dev/hda # View disk parameters (for IDE devices only)
# DMESG | grep IDE # View IDE device detection status at startup

Internet

# ifconfig # View the properties of all network interfaces
# iptables-l # View firewall settings
# route-n # View the 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 # Real-time display of process status

User

# w # View active Users
# ID < user name > # view specified user information
# last # View user log in log
# cut-d:-f1/etc/passwd # View All users of the system
# cut-d:-f1/etc/group # View all system groups
# crontab-l # View Current user's scheduled tasks

Service

# chkconfig--list # list all system services
# chkconfig--list | grep on # Lists all startup system services

Program

# rpm-qa # View all installed Packages

Common commands are organized as follows:
View the serial number of the motherboard: Dmidecode | Grep-i ' Serial number '

Detecting new hardware with hardware detection program Kuduz: Service kudzu start (or restart)

View CPU information: Cat/proc/cpuinfo [DMESG | grep-i ' CPU '][DMIDECODE-T processor]

View memory information: Cat/proc/meminfo [Free-m][vmstat]

View card information: CAT/PROC/PCI

View video card/sound card information: Lspci |grep-i ' VGA ' [DMESG | grep-i ' VGA ']

View nic Information: DMESG | Grep-i ' ETH ' [cat/etc/sysconfig/hwconf | grep-i eth][lspci | grep-i ' ETH ']
<!--more-->
View PCI information: LSPCI (more intuitive than CAT/PROC/PCI)

View USB devices: Cat/proc/bus/usb/devices

Viewing the keyboard and mouse: Cat/proc/bus/input/devices

View system hard disk information and usage: Fdisk & disk–l & DF

To view interrupt requests (IRQ) for each device: cat/proc/interrupts

View System Architecture: UNAME-A

View and start the system's 32-bit or 64-bit kernel mode: isalist–v [isainfo–v][isainfo–b]

Dmidecode viewing hardware information, including BIOS, CPU, memory, etc.

Determine the current display refresh rate:/usr/sbin/ffbconfig–rev \?

View System configuration:/usr/platform/sun4u/sbin/prtdiag–v

To view patches already applied in the current system: showrev–p

Displays the current runlevel: WHO–RH

View current BIND version information: Nslookup–class=chaos–q=txt Version.bind

DMESG | More View hardware information
LSPCI display peripheral information, such as USB, network card and other information
Lsnod Viewing loaded drivers
Lshw
PSRINFO-V view current processor type and speed (frequency)
Prtconf-v Print the current OBP version number
Iostat–e viewing hard disk physical information (vendor, RPM, capacity)
Prtvtoc/dev/rdsk/c0t0d0s viewing the geometry and partitioning information for a disk
Df–f Ufs–o I shows the number of i-node that have been used and not used
Isalist–v

For files in "/proc", you can use the File View command to browse its contents, and the file contains system-specific information:
Cpuinfo Host CPU Information
DMA Host DMA Channel information
Filesystems File System Information
Interrupts host interrupt Information
Ioprots host I/O port number information
Meninfo Host Memory Information
Version Linux memory release information

Note: proc–process information Pseudo-filesystem process information masquerading file system

Reference http://blog.chinaunix.net/uid-26782198-id-3242120.html

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.