Linux System Information View commands Learn notes

thanks to my mentor's strong support, I applied for a United States server, let me use to do the experiment to deploy something, suddenly interest, want to take a good look at this server system information, and review the command to view system information. (The main reference of the content "How Linux Views System Information" )

Thank you very much for teacher Liu's strong support and do not abandon!!!

Then start the System Information review tour.

1, the CPU Information view:

[Email protected]:~# more/proc/cpuinfo |grep "model name"

Model Name:qemu Virtual CPU version 1.1.2

[Email protected]:~# grep "model name"/proc/cpuinfo

Model Name:qemu Virtual CPU version 1.1.2

[Email protected]:~# grep "model name"/proc/cpuinfo |cut-f2-d:

QEMU Virtual CPU Version 1.1.2

2. View Memory:

[Email protected]:~# vi/proc/meminfo

memtotal:2050116 KB

memfree:1663960 KB

buffers:23220 KB

cached:270244 KB

swapcached:0 KB

active:114640 KB

inactive:224364 KB

Active (anon): 45676 KB

Inactive (anon): 276 KB

Active (file): 68964 KB

Inactive (file): 224088 KB

unevictable:0 KB

mlocked:0 KB

swaptotal:2096444 KB

swapfree:2096444 KB

Dirty:24 KB

writeback:0 KB

anonpages:45560 KB

mapped:10432 KB

shmem:392 KB

slab:22268 KB

sreclaimable:13064 KB

sunreclaim:9204 KB

kernelstack:592 KB

pagetables:7000 KB

nfs_unstable:0 KB

bounce:0 KB

writebacktmp:0 KB

commitlimit:3121500 KB

committed_as:10310868 KB

vmalloctotal:34359738367 KB

vmallocused:7896 KB

vmallocchunk:34359724836 KB

hardwarecorrupted:0 KB

anonhugepages:10240 KB

hugepages_total:0

hugepages_free:0

hugepages_rsvd:0

hugepages_surp:0

hugepagesize:2048 KB

directmap4k:34808 KB

directmap2m:2062336 KB

(All memory information above)

[Email protected]:~# grep memtotal/proc/meminfo

memtotal:2050116 KB

[Email protected]:~# free-m

Total used free shared buffers Cached

mem:2002 375 1626 0 22 264

-/+ buffers/cache:88 1913

swap:2047 0 2047

[Email protected]:~# free-m|grep ' Mem ' |awk ' {print $} '

2002

3. View the number of Linux CPU bits:

[Email protected]:~# getconf long_bit

64

4. View the Linux version:

All version information:

[Email protected]:~# more/etc/os-release

Name= "Ubuntu"

Version= "14.04, trusty Tahr"

Id=ubuntu

Id_like=debian

Pretty_name= "Ubuntu 14.04 LTS"

Version_id= "14.04"

Home_url= "http://www.ubuntu.com/"

Support_url= "http://help.ubuntu.com/"

Bug_report_url= "http://bugs.launchpad.net/ubuntu/"

[Email protected]:~# more/etc/issue

Ubuntu 14.04 LTS \ \l

[Email protected]:~# more/proc/version

Linux version 3.13.0-27-generic ([email protected]) (GCC version 4.8.2 (Ubuntu 4.8

.2-19ubuntu1)) #50-ubuntu SMP Thu May 18:06:16 UTC 2014

5. View Kernel version

[Email protected]:~# uname-r

3.13.0-27-generic

[Email protected]:~# uname-a

Linux nems 3.13.0-27-generic #50-ubuntu SMP Thu may 18:06:16 UTC x86_64 x86_64 x86_64 gnu/linux

6. View time zone and modify time zone:

[Email protected]:~# date-r

Mon, OCT 2015 21:55:03 +0800

[Email protected]:~# mv/etc/localtime/etc/local

Locale.alias localtime

[Email protected]:~# mv/etc/localtime/etc/local

Locale.alias localtime

[Email protected]:~# mv/etc/localtime/etc/localtime.save

[Email protected]:~# cp/usr/share/zoneinfo/asia/shanghai/etc/localtime

[Email protected]:~# date-r

Mon, OCT 2015 21:56:52 +0800

7, Host name:

View Host Name:

[Email protected]:~# hostname

Nems

Modify Host Name:

[Email protected]:/etc# vi hostname

Nems

Restart takes effect

Modified to NEMS (never ending Mining sentences)

8. View SELinux Status:

[Email protected]/]# Sestatus

SELinux status:disabled

9. Network:

Ip:

[Email protected]:~# ifconfig|grep ' inet addr: ' |grep-v ' 127.0.0.1 ' |cut-d:-f2|awk ' {print '} '

10.128.131.235

211.155.92.229

10. View the installed packages:

[Email protected]:~# rpm-qa|wc-l

0

11. Disk and partition conditions:

[Email protected]:~# df-h

Filesystem Size used Avail use% mounted on

/DEV/VDA1 25G 1.4G 22G 6%/

None 4.0K 0 4.0K 0%/sys/fs/cgroup

Udev 991M 4.0K 991M 1%/dev

Tmpfs 201M 388K 200M 1%/run

None 5.0M 0 5.0M 0%/run/lock

None 1002M 0 1002M 0%/run/shm

None 100M 0 100M 0%/run/user

/DEV/VDC1 99G 60M 94G 1%/data

[Email protected]:~# du-sh

444K

[Email protected]:~# du/dev/vdc1-sh

0/dev/vdc1

[Email protected]:~# du/dev/vda1-sh

0/dev/vda1

[Email protected]:~# du/etc/-sh

5.1m/etc/

12. View the default language:

[Email protected]:~# echo $LANG $LANGUAGE

en_US. UTF-8 En_us:en

The experiment needs to modify the default language:

[Email protected]:~# sudo vi/etc/default/locale #打开之后, enter the following code

Lang= "ZH_CN"

Language= "Zh_cn:zh"

Lc_messages= "ZH_CN. UTF-8 "

Lc_ctype= "ZH_CN. UTF-8 "

Lc_collate= "ZH_CN. UTF-8 "

Restart Effective: Shutdown-r now

[Email protected]:~# echo $LANG $LANGUAGE

ZH_CN Zh_cn:zh

Linux System Information View commands Learn notes