Find out What Version of Linux Running and Whether it is 32-bit or 64-bit

Document ID : KB000113486
Last Modified Date : 10/09/2018
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How do you determine the version and architecture (32-bit or 64-bit) of a Linux machine?

Find out what version of Linux is being run:

[root@server-E16258 fonts]# cat /etc/*release
NAME="Red Hat Enterprise Linux Server"
VERSION="7.4 (Maipo)"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.4 (Maipo)"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
Red Hat Enterprise Linux Server release 7.4 (Maipo)
Red Hat Enterprise Linux Server release 7.4 (Maipo)

The above example is showing release 7.4

Find out whether Linux OS is 32-bit or 64-bit:

[root@server-E16258 fonts]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 4
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 63
Model name: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz
Stepping: 0
CPU MHz: 2499.387
BogoMIPS: 4999.99
Hypervisor vendor: VMware
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 30720K
NUMA node0 CPU(s): 0-3
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts

The above example is showing this Linux is 64-bit.