#cat /proc/cpuinfo | grep "physical id" | uniq | wc -l

explain :uniq command : Delete duplicate lines ;wc –l command : Count rows

1.2 see CPU Kernel number

#cat /proc/cpuinfo | grep "cpu cores" | uniq

cpu cores : 4

explain :cpu The number of cores is 4

1.3 see CPU model

#cat /proc/cpuinfo | grep 'model name' |uniq

model name : Intel(R) Xeon(R) CPU E5630 @ 2.53GHz

in summary : The server has 2 individual 4 nucleus CPU, model Intel(R) Xeon(R) CPU E5630 @ 2.53GHz

2 view memory

2.1 View total memory

#cat /proc/meminfo | grep MemTotal

MemTotal: 32941268 kB // Memory 32G

2.2 View the number of memory modules

# dmidecode |grep -A16 "Memory Device$"

3 View hard disk

3.1 View hard disk size

# fdisk -l | grep Disk

Disk /dev/cciss/c0d0: 146.7 GB, 146778685440 bytes

summary : Hard disk size 146.7G, That is, the trademark of the manufacturer 160G

4 Other command sets

uname -a # View kernel / operating system /CPU Informative linux system information

head -n l /etc/issue # View operating system version

cat /proc/cpuinfo # see CPU information

hostname # View the name of the computer linux System information command

lspci -tv # List all PCI equipment

lsusb -tv # List all USB Equipment linux System information command

lsmod # Lists the loaded kernel modules

env # View environment variable resources

free -m # View memory usage and swap usage

df -h # View the usage of each partition

du -sh # 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 running time , Number of users , load

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

mount | column -t # Viewing the status of attached partitions

fdisk -l # View all partitions

swapon -s # View all swap partitions

hdparm -i /dev/hda # View disk parameters ( Only for IDE equipment )

dmesg | grep IDE # View at startup IDE Device detection status network

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 # 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 in the system

crontab -l # View the scheduled task service of the current user

chkconfig –list # List all system services

chkconfig –list | grep on # List all started system services

rpm -qa # View all installed packages

cat /proc/cpuinfo : see CPU Of relevant parameters linux System command

cat /proc/partitions : see linux System information commands for hard disk and partition information

cat /proc/meminfo : see linux Of system memory information linux System command

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

cat /proc/ioports : View device io port

cat /proc/interrupts : View interrupt

cat /proc/pci : see pci Device information

cat /proc/swaps : View all swap Partition information