CentOS command and method for viewing system information

CentOS command and method for viewing system information

Collect and organize commands and methods for viewing system information in linux:

1. How to view server system information in linux:

1. Check the host name, kernel version, and CPU architecture:

1. # Uname-n-r-p-o
2. Localhost. localdomain 2.6.32-220. el6.i686 i686

2. view the Linux system type and version:

1. # Head-n 1/etc/issue
2. CentOS release 6.2 (Final)

3. view the Language Character Set settings:

1. # Echo $ LANG $ LANGUAGE
2. Zh_CN.UTF-8
3. # Cat/etc/sysconfig/i18n
4. LANG = "zh_CN.UTF-8"

4. View users:

1. # Whoami # view the current logon User Name
2. # Id # view the current user and its Group
3. # W # view currently logged on users and running commands
4. # Last # view recently logged on users
5. # Cat/etc/passwd | awk-F: '{print $1}' # view all users on the server

5. view other system information:

1. # Date '+ % Y-% m-% d % H: % M: % s' # view system time
2. # Ps-ef # view running processes
3. # Uptime # view the server startup duration, number of users, and average load
4. # Lsmod # view all loaded modules
5. # Env # Check System Environment Variables
6. # Crontab-l # view scheduled tasks

Ii. View server hardware information in linux:

1. view the server CPU information:

1. # Grep 'model name'/proc/cpuinfo | awk-F: '{print $2}' | sed's ### G' | uniq-c
2. 8 Intel (R) Xeon (R) CPU E5630 @ 2.53 GHz #8-core Intel Xeon CPU

2. view the server CPU count:

1. # Getconf LONG_BIT
2. 32

3. view the NIC model:

1. # Lspci | grep Ethernet
2. Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)

4. view other hardware information:

1. # Lspci-TV # view all PCI devices
2. # Lsusb-TV # view all usb peripherals
3. # Cat/etc/sysconfig/keyboard # view keyboard layout

Iii. View server storage Information in linux:

1. view memory information:

1. # Sed-n'/MemTotal \ | MemFree/P'/proc/meminfo
2. MemTotal: 16426736 kB
3. MemFree: 14171748 kB

2. view the swap space:

1. # Sed-n'/SwapTotal \ | SwapFree/P'/proc/meminfo
2. SwapTotal: 16771852 kB
3. SwapFree: 16771852 kB

3. view the usage of the mounted partition space:

1. # Df-h
2. File System capacity used available % mount point
3. /Dev/sda6 9.7G 570 M 8.7G 7%/
4. /Dev/sda7 3.9G 73 M 3.7G 2%/tmp
5. /Dev/sda2 20g 2.5G 16G 14%/var
6. /Dev/sda8 388G 4.9G 363G 2%/storage
7. /Dev/sda5 15G 2.4G 12G 18%/usr
8. /Dev/sda1 92 MB 12 M 75 M 14%/boot
9. Tmpfs 7.9G 0 7.9G 0%/dev/shm

4. View server network information in linux:

1. Check the Linux host name:

1. # Hostname
2. Localhost. localdomain

2. view the Server IP Address:

1. # Ifconfig | grep 'inet addr: '| grep-V' 127. 0.0.1' | cut-d:-f2 | awk '{print $1 }'
2. 192.168.17.238
3. 192.168.1.9

3. view the linux Gateway:

1. # Route | grep default
2. Default 192.168.1.1 0.0.0.0 UG 0 0 0 em1

4. view the linux Port:

1. # Netstat-lntp # view the listening port (Listen)
2. # Netstat-antp # view all established TCP connections

5. view the linux service:

1. # Chkconfig -- list | grep enabled # view enabled services
2. Sshd 0: Disable 1: Disable 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable
3. Httpd 0: Disabled 1: Disabled 2: Disabled 3: enabled 4: Disabled 5: Disabled 6: Disabled

6. view the DNS configuration of the server:

1. # Cat/etc/resolv. conf
2. Nameserver 192.168.0.66
3. Nameserver 202.106.0.20

7. other network information:

1. # Iptables-L # view firewall rules
2. # Route-n # view the route table
3. # Netstat-s # view network statistics