Common commands for Linux to get system information

Recently read some Linux command line articles, in the system information to learn a lot of commands. Think of a previously written article in fact, Linux so much easier to find these system information to view the command can also be summed up a small thing to come.

# CAT/PROC/MTRR View Mtrrs memory type range Registers

# uhttp://www.aliyun.com/zixun/aggregation/11696.html >name-r View current kernel version

# uname-a can view information including kernel version, machine hardware information, network node name, operating system name, etc.

# Cat/proc/cpuinfo View CPU Details

# DMESG list boot process record

# LSMOD List Loaded modules

# LSPCI List Equipment details

# lspci-v List more detailed kernel driver kernel module

# LSPCI-VVV Very detailed

# LSPCI > Lspci-note transfer lspci display to new file Lspci-note

#lspci >> Lspci-note Transport added to presence file Lspci-note

# Lspci | Pager pagination Display

System

# uname-a # View kernel/operating system 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 sets Prepare # LSUSB-TV # list all USB devices # lsmod # list loaded kernel modules # env # View Environment variables

Resources

# free-m # View memory usage and swap area usage # DF # View each partition usage # du-sh < directory name > # View the size of the specified directory # grep memtotal/proc/meminfo # View Total Memory # grep Memfree/ Proc/meminfo # View Idle memory # uptime # View system run time, number of users, load # cat/proc/loadavg # View System load

Disks and partitions

# Mount | Column-t # View attached partition status # fdisk-l # View all partitions # swapon-s # view all swap partitions # hdparm-i/DEV/HDA # View disk parameters (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 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 user # ID < username > # View specified user information # Last # View user login log # cut-d:-f1/etc/passwd # View All users of the system # cut-d:-f1/etc/group # View all groups of the system # Cron Tab-l # View Scheduled tasks for the current user

Service

# chkconfig--list # List all system Services # Chkconfig--list | grep on # Lists all initiated system services

Program

# rpm-qa # View all installed Packages