Command for viewing CPU cores and other parameters in Linux

# Uname-

Linux euis1 2.6.9-55. elsmp #1 SMP Fri APR 20 17:03:35 EDT 2007 i686 i686 i386 GNU/Linux

(View the kernel information of the current operating system)

 

# Cat/etc/issue | grep Linux

Red Hat Enterprise Linux as Release 4 (nahant Update 5)

(View the released version of the current operating system)

 

# Cat/proc/cpuinfo | grep name | cut-F2-D: | uniq-C

8 Intel (r) Xeon (r) CPU e5410 @ 2.33 GHz

(We can see eight logical CPUs and the CPU model)

# Cat/proc/cpuinfo | grep physical | uniq-C

4 physical ID: 0

4 physical ID: 1

(It means two 4-core CPUs)

# Getconf long_bit

32

(This indicates that the current CPU runs in 32bit mode, but does not indicate that the CPU does not support 64bit)

 
# Cat/proc/cpuinfo | grep flags | grep 'lm '| WC-l

8

(If the result is greater than 0, 64bit computing is supported. lm indicates long mode, and Lm indicates 64bit)

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View the Linux system version and the number of digits

 

1. view the kernel version

[Oracle @ svr15 ~] $ CAT/etc/issue
Red Hat Enterprise Linux as Release 4 (nahant)
Kernel/r on an/m

[Oracle @ svr15 ~] $ CAT/proc/version
Linux version 2.6.9-5. elsmp (bhcompile@decompose.build.redhat.com) (GCC version 3.4.3 20041212 (Red Hat 3.4.3-9. EL4) #1 SMP wed Jan 5 19:30:39 est 2005

[Oracle @ svr15 ~] $ Uname-R
2.6.9-5. elsmp

 

2. view the number of operating system digits
[Oracle @ svr15 ~] $ Ls/# If there is lib64 or this directory, the operating system is 64-bit
Bin boot Dev etc home initrd lib lost + found media misc mnt opt proc root sbin SELinux SRV sys tmp usr VaR

[Oracle @ svr15 ~] $ Getconf long_bit
32