Linux basic command using CLI (more)

You are most welcome to this post.

Really thanks to you for your interest in this topics. :)

Hope that you are well and enjoying the Linux. Yes, Linux is much more interesting, because, you can customize it as your wish. In this post we’ll see some Linux basic command.

Linux basic command using CLI (more)

Before going to the next part, just remember this small topics.

 

“ ~ ” >> home directory.

“ / ” >> root partition

“ /root ” >> home directory used by root user

“ /home ” >> user’s home

 

Now in this post we’ll see some basic and interesting command.

Lets enjoy them.

 

[ece@localhost Desktop]$ su root

Password:

 

Command:

[root@localhost ~]# who

Output:

ece     :0           2016-05-05 22:17 (:0)

ece     pts/0       2016-05-05 22:17 (:0)

 

Command:

[root@localhost ~]# whoami

Output:

Root

 

Command: To show the hostname:

[root@localhost ~]# hostname

 

Output:

localhost.localdomain

 

Want to see the current date?? Just write date in CLI :

[root@localhost ~]# date

See!! Current date is showing!!

Thu May 5 23:41:00 EDT 2016

 

Now we’ll see the current date of our machine.

Just type cal. It will show the present month.

[root@localhost ~]# cal

 

Now if you want to show the calendar of a year, then can type this:

[root@localhost ~]# cal 2017

 

 

Want to see the last unsuccessful login?? Here it is.

[root@localhost ~]# lastb

btmp begins Thu May 5 08:42:02 2016

 

See the run level (5-GUI, 3-CMD, n-none)

[root@localhost ~]# runlevel

N 5

Through this command you can see the kernel version:

[root@localhost ~]# uname -r

 

Want to see the operating system name??

[root@localhost ~]# uname

Linux

See the current version from these command.

[root@localhost home]# vi /etc/centos-release

CentOS Linux release 7.2.1511 (Core)

 

Task manager:

[root@localhost ~]# top

 

 

Login details:

[root@localhost ~]# lastlog

Username         Port     From             Latest

root             pts/0                     Thu May 5 22:18:46 -0400 2016

bin                                       **Never logged in**

daemon                                     **Never logged in**

 

RAM info:

[root@localhost ~]# free -m

Mem:           977         522         60           8         395         283

Swap:           511           0         511

[root@localhost ~]# df -HT

 

tmpfs         tmpfs     513M 156k 513M   1% /dev/shm

tmpfs         tmpfs     513M 7.5M 506M   2% /run

tmpfs         tmpfs     513M     0 513M   0% /sys/fs/cgroup

/dev/sda1     xfs       4.2G 208M 4.0G   5% /boot

tmpfs         tmpfs     103M 4.1k 103M   1% /run/user/42

tmpfs         tmpfs     103M 8.2k 103M   1% /run/user/1000

/dev/sr0       iso9660   4.4G 4.4G   0 100% /run/media/ece/CentOS 7 x86_64

 

System uptime info:

[root@localhost ~]# uptime

23:43:23 up 1:26, 2 users, load average: 0.03, 0.04, 0.05

 

IP address info:

[root@localhost ~]# ip addr

 

List of previous history:

[root@localhost ~]# history

1 nmcli connection show

2 nmtui

3 nmtui

 

Want to change directory??

[root@localhost ~]# cd /

 

See the list:

[root@localhost /]# ls

 

Change the directory to the location /var/log:

[root@localhost /]# cd /var/log

 

Now going back to /var from /log

[root@localhost log]# cd ..

[root@localhost var]# cd –

/var/log

[root@localhost log]# cd /

[root@localhost /]# cd home

 

Through the “mkdir” command you can make a directory. Here I’ve created a directory named “test”

[root@localhost home]# mkdir test

 

Now going to the directory named “test”

[root@localhost home]# cd test

 

The “pwd” command shows you the present working directory.

[root@localhost test]# pwd

/home/test

[root@localhost test]#

 

 

That’s the end of this post. Hope that you have enjoyed. Thanks for visiting here.

Hoping for your return.