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Find out current Language on linux

Saturday, 14 November 2009 linux

 

Find out current Language:

set | egrep '^(LANG|LC_)'

output



LANG=zh_CN.UTF-8
 

How to find out details about hardware on the Linux machine

Monday, 02 November 2009 linux

 lspci is a great utility for listing the system hardware. (Anything on the PCI bus, anyway.)

cat /proc/cpuinfo - Displays CPU info

cat /proc/meminfo - Displays memory info

dmesg (or cat /var/log/dmesg) contains some info, not necessarily everything.

If you have a RedHat/CentOS system, you can use sosreport to collect a good bit of information, though I don't know if it has all the hardware info listed in it.

 

How do I find out if my Linux server CPU can run a 64 bit kernel versionor not

Sunday, 01 November 2009 linux

 (a) Ask your hardware vendor

(b) Find out yourself by reading manuals

(c) Or run the following commands:
Here is output from one of my production Dual Opteron server:
$ less /proc/cpuinfo

 

[root@HCMRTG_BY_YaoBin ~]# less /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Xeon(TM) CPU 3.00GHz
stepping        : 10
cpu MHz         : 3000.370
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr ss
e sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm
bogomips        : 6003.78
 
processor       : 1
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Xeon(TM) CPU 3.00GHz
stepping        : 10
cpu MHz         : 3000.370
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr ss
e sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm
bogomips        : 5999.40
 
processor       : 2
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Xeon(TM) CPU 3.00GHz
stepping        : 10
cpu MHz         : 3000.370
cache size      : 2048 KB
physical id     : 3
siblings        : 2
core id         : 0
cpu cores       : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr ss
e sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm
bogomips        : 5999.43
 
processor       : 3
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Xeon(TM) CPU 3.00GHz
stepping        : 10
cpu MHz         : 3000.370
cache size      : 2048 KB
physical id     : 3
siblings        : 2
core id         : 0
cpu cores       : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr ss
e sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm
bogomips        : 5999.47
 
[root@MRTGn ~]# uname -a
Linux HCMRTGn 2.6.18-92.el5 #1 SMP Tue Apr 29 13:16:12 EDT 2008 i686 i686 i386 GNU/Linux
 

How do I find out CPU is 32bit or 64bit

Sunday, 01 November 2009 linux

 Simply type the following command and if you see lm in output, you have a 64 bit system:
$ grep flags /proc/cpuinfo

[root@~]# grep flags /proc/cpuinfo
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm
 

How do i find out linux cpu utilization

Wednesday, 21 October 2009 linux

 The top program provides a dynamic real-time view of a running system.  It can display system summary information as well as a list of

       tasks currently being managed by the Linux kernel.  The types of system summary information shown and the types,  order  and  size  of
       information displayed for tasks are all user configurable and that configuration can be made persistent across restarts.
 
       The  program provides a limited interactive interface for process manipulation as well as a much more extensive interface for personal
       configuration  --  encompassing every aspect of its operation.  And while top is referred to throughout this document, you are free to
       name  the  program anything you wish.  That new name, possibly an alias, will then be reflected on top's display and used when reading
       and writing a configuration file.
 
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