View various software versions and parameters under Linux

Linux kernel version check

Method 1. Use the uname command to check

# uname -a
# 查看所有参数
# uname -r
3.10.0-693.2.2.el7.x86_64

You can see that my current kernel version is 3.10. 0.

Method 2. View /proc/version

# cat /proc/version
Linux version 3.10.0-693.2.2.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) ) #1 SMP Tue Sep 12 22:26:13 UTC 2017

View the release version

You can view /etc/centos- release to view the release version, but this method is only suitable for centos releases.

# cat /etc/centos-release
CentOS Linux release 7.4.1708 (Core)

The other method is suitable for all distributions, but the prerequisite is that the redhat-lsb software needs to be installed.

yum install -y redhat-lsb

Then you can use lsb_release to view it

# lsb_release -r
Release: 7.4.1708

View hardware parameters

View the word length of the system

# getconf  LONG_BIT
64

To view cpu information, use cat /proc/cpuinfo to list all cpu information.

# cat /proc/cpuinfo 
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model  : 85
model name : Intel(R) Xeon(R) Platinum 8163 CPU @ 2.50GHz
stepping : 4
microcode : 0x1
cpu MHz  : 2499.988
cache size : 33792 KB
physical id : 0
siblings : 16
core id  : 0
cpu cores : 8
apicid  : 0
initial apicid : 0
fpu  : yes
fpu_exception : yes
cpuid level : 13
wp  : yes
flags  : ……
bogomips : 4999.97
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model  : 85
model name : Intel(R) Xeon(R) Platinum 8163 CPU @ 2.50GHz
stepping : 4
……

cpu cores indicates the number of cores of the cpu, which is an 8-core cpu.

How to check the number of cpu, here are two methods: the first is to use cat /proc/cpuinfo, but use grep and wc commands together to calculate.

# cat /proc/cpuinfo  | grep processor | wc -l
16

The other method is very simple and will be listed directly for you.

# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                16
……

As you can see from the above, the server currently contains 16 CPUs, all of which have 8 cores.

Check memory

To check the memory size and usage of the system, you can use the free command.

# free -h
              total        used        free      shared  buff/cache   available
Mem:            15G        1.8G        656M        1.5M         13G         13G
Swap:          1.0G          0B        1.0G

As you can see, the total memory size is 15G, and 1.8G of memory has been used.

Check the number and usage of hard disks

To check the number of hard disks, you can use the lsblk command, which will list all hard disks and You can see from the partition

lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
vda    253:0    0   40G  0 disk 
└─vda1 253:1    0   40G  0 part /
vdb    253:16   0  250G  0 disk 
└─vdb1 253:17   0  150G  0 part /www

under the hard disk that there are currently two hard disks on the server, and the device names are vda and vdb.

If you want to check the hard disk usage, you need to use the df -h command.

[root@izj6c0zd30oi794erd9hdvz ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        40G  5.7G   32G  16% /
devtmpfs        7.8G     0  7.8G   0% /dev
tmpfs           7.8G  632K  7.8G   1% /dev/shm
tmpfs           7.8G  476K  7.8G   1% /run
tmpfs           7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/vdb1       148G   62G   79G  44% /www
tmpfs           1.6G     0  1.6G   0% /run/user/0

View php related information

#php version view

# php -v
PHP 7.4.4 (cli) (built: Apr 13 2020 10:42:43) ( NTS )

php configuration file search

# php --ini
Configuration File (php.ini) Path: /www/server/php/74/etc
Loaded Configuration File:         /www/server/php/74/etc/php.ini

View Apache related information

View apache version information

# httpd -v
Server version: Apache/2.4.41 (Unix)
Server built:   Nov  4 2019 17:53:11

To view the location of the apache configuration file, still use the httpd command, but you need to use -V to view, -V can see the compile-time parameters.

# /usr/local/apache/bin/httpd -V
……
 -D SERVER_CONFIG_FILE="conf/httpd.conf"

View nginx related information

The method to check nginx version and configuration file location is the same as apache

# /usr/local/nginx/sbin/nginx -v
nginx version: nginx/1.16.1

# /usr/local/nginx/sbin/nginx -V
……

View Mysql related information

View the mysql version information, which is different from before. Use -V, capital V, here.

# mysql -V
mysql  Ver 14.14 Distrib 5.6.37, for Linux (x86_64) using  EditLine wrapper

To view the location of the mysql configuration file, you need to use the option --help

# mysql --help | grep 'Default options' -A 1
Default options are read from the following files in the given order:
/etc/mysql/my.cnf /etc/my.cnf ~/.my.cnf

The above is the detailed content of View various software versions and parameters under Linux. For more information, please follow other related articles on the PHP Chinese website!