Error : -bash: ifconfig: command not found

 Error :  -bash: ifconfig: command not found  

Login as root user :

[root@0.0.0.0]#

[root@0.0.0.0]#

[root@0.0.0.0]#

[root@0.0.0.0]# ifconfig

-bash: ifconfig: command not found

[root@0.0.0.0]#

[root@0.0.0.0]#

[root@0.0.0.0]#

Install net-tools package using yum command 

[root@0.0.0.0]# yum install net-tools

Updating Subscription Management repositories.

Unable to read consumer identity

This system is not registered with an entitlement server. You can use subscription-manager to register.

Last metadata expiration check: 0:01:33 ago on Mon 22 May 2023 04:36:53 PM UTC.

Dependencies resolved.

==============================================================================================================================

 Package                Architecture        Version                                Repository                            Size

==============================================================================================================================

Installing:

 net-tools              x86_64              2.0-0.52.20160912git.el8               rhel-8-baseos-rhui-rpms              322 k

Transaction Summary

==============================================================================================================================

Install  1 Package

Total download size: 322 k

Installed size: 942 k

Is this ok [y/N]: y

Downloading Packages:

net-tools-2.0-0.52.20160912git.el8.x86_64.rpm                                                 9.4 MB/s | 322 kB     00:00

------------------------------------------------------------------------------------------------------------------------------

Total                                                                                         6.1 MB/s | 322 kB     00:00

Running transaction check

Transaction check succeeded.

Running transaction test

Transaction test succeeded.

Running transaction

  Preparing        :                                                                                                      1/1

  Installing       : net-tools-2.0-0.52.20160912git.el8.x86_64                                                            1/1

  Running scriptlet: net-tools-2.0-0.52.20160912git.el8.x86_64                                                            1/1

  Verifying        : net-tools-2.0-0.52.20160912git.el8.x86_64                                                            1/1

Installed products updated.

Installed:

  net-tools-2.0-0.52.20160912git.el8.x86_64

Complete!

[root@0.0.0.0]#

[root@0.0.0.0]#

[root@0.0.0.0]# ifconfig

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9001

        inet 172.21.31.211  netmask 255.255.240.0  broadcast 172.31.31.255

        inet6 f80::6:3ccf:fe7d:1a13  prefixlen 64  scopeid 0x20<link>

        ether 0a:76:33:7d:1a:13  txqueuelen 1000  (Ethernet)

        RX packets 86484  bytes 127950677 (122.0 MiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 11182  bytes 1084233 (1.0 MiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::1  prefixlen 128  scopeid 0x10<host>

        loop  txqueuelen 1000  (Local Loopback)

        RX packets 509  bytes 77514 (75.6 KiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 509  bytes 77514 (75.6 KiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@0.0.0.0]#

[root@0.0.0.0]#

How to download file using wget and curl command in linux ?

Download file using wget and curl command in linux 

[root@0.0.0.0 ~]# rpm -qa | grep -i wget

wget-1.19.5-11.el8.x86_64

[root@0.0.0.0 ~]#

Using wget commnad :

[root@0.0.0.0 ~]#

[root@0.0.0.0 ~]# wget https://the.earth.li/~sgtatham/putty/latest/putty-0.78.tar.gz

--2023-05-22 15:44:09--  https://the.earth.li/~sgtatham/putty/latest/putty-0.78.tar.gz

Resolving the.earth.li (the.earth.li)... 93.93.131.124, 2a00:1098:86:4d:c0ff:ee:15:900d

Connecting to the.earth.li (the.earth.li)|93.93.131.124|:443... connected.

HTTP request sent, awaiting response... 302 Found

Location: https://the.earth.li/~sgtatham/putty/0.78/putty-0.78.tar.gz [following]

--2023-05-22 15:44:10--  https://the.earth.li/~sgtatham/putty/0.78/putty-0.78.tar.gz

Reusing existing connection to the.earth.li:443.

HTTP request sent, awaiting response... 200 OK

Length: 2811628 (2.7M) [application/x-gzip]

Saving to: ‘putty-0.78.tar.gz’

putty-0.78.tar.gz               100%[=====================================================>]   2.68M  4.71MB/s    in 0.6s

2023-05-22 15:44:10 (4.71 MB/s) - ‘putty-0.78.tar.gz’ saved [2811628/2811628]

[root@0.0.0.0 ~]#

Using curl command :

[root@0.0.0.0 tmp]# curl -O https://the.earth.li/~sgtatham/putty/latest/putty-0.78.tar.gz

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100   306  100   306    0     0   1066      0 --:--:-- --:--:-- --:--:--  1066

[root@0.0.0.0 tmp]#

[root@0.0.0.0 tmp]#

How to check User Shell details ?

 Check User Shell details  :

[root@0.0.0.0]# cat /etc/passwd

root:x:0:0:root:/root:/bin/bash

[root@0.0.0.0]# echo $0

-bash

[root@0.0.0.0]#

How to check available shell in Linux OS ?

 Check available shell in Linux OS : 

[root@0.0.0.0]# cat /etc/shells

/bin/sh

/bin/bash

/usr/bin/sh

/usr/bin/bash

/bin/ksh

/bin/rksh

/usr/bin/ksh

/usr/bin/rksh

[root@0.0.0.0]#