View System Information in liunx, and view system information in liunx

View System Information in liunx, and view system information in liunx

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System

# Uname-a # view kernel/operating system/CPU Information

# Head-n 1/etc/issue # view the operating system version

# Cat/proc/cpuinfo # view CPU Information

# Hostname # view the 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 # view memory usage and swap zone usage

# Df-h # view the usage of each partition

# Du-sh <Directory Name> # view the size of a specified directory

# Grep MemTotal/proc/meminfo # view total memory

# Grep MemFree/proc/meminfo # view the Amount of idle memory

# Uptime # view system running time, number of users, and load

# Cat/proc/loadavg # view system load

Disks and partitions

# Mount | column-t # view the status of the mounted Partition

# 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 # view the IDE Device Detection Status at startup

Network

# Ifconfig # view the attributes of all network interfaces

# Iptables-L # view firewall settings

# Route-n # view the route 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 <User Name> # view specified user information

# Last # view User Logon logs

# 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 tasks of the current user

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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System

# Uname-a # view kernel/operating system/CPU Information

# Head-n 1/etc/issue # view the operating system version

# Cat/proc/cpuinfo # view CPU Information

# Hostname # view the 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 # view memory usage and swap zone usage

# Df-h # view the usage of each partition

# Du-sh <Directory Name> # view the size of a specified directory

# Grep MemTotal/proc/meminfo # view total memory

# Grep MemFree/proc/meminfo # view the Amount of idle memory

# Uptime # view system running time, number of users, and load

# Cat/proc/loadavg # view system load

Disks and partitions

# Mount | column-t # view the status of the mounted Partition

# 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 # view the IDE Device Detection Status at startup

Network

# Ifconfig # view the attributes of all network interfaces

# Iptables-L # view firewall settings

# Route-n # view the route 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 <User Name> # view specified user information

# Last # view User Logon logs

# 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 tasks of the current user

Service

# Chkconfig -- list # list all system services

# Chkconfig -- list | grep on # list all started system services

Program

# Rpm-qa # view all installed software packages