LINUX COMMANDS PART- 1
The command to check the current Directory
pwd
NOW, WE WILL LEARN TO CHANGE THE DIRECTORY OR FOLDER
1) If you want change your directory
Command:
cd Desktop
NOTE: Linux is case sensitive so careful with the letters
If your by mistakenly type desktop instead of Desktop you will get error as shown below:
Command:
cd desktop
bash: cd: desktop: No such file or directory
2) Again if you check the path
Command:
pwd
Output:
/home/user/Desktop
if you want to come back from Desktop
Command:
cd ..
Before:
home/user/Desktop
Output:
/home/user
3) If you want to toggle between the directory
Command:
cd ~
HERE ARE THE SOME INITIAL COMMANDS:
| command | Result |
| clear | If you want clear the terminal |
| Logname | for display the current user |
| tty | for the current terminal |
| pwd | To check the path |
| uptime | Time of OS |
| uname | Name of the OS |
| uname -p | Processer of OS |
| uname -r | Version of OS |
| uname -v | Release date of OS |
| uname -n | Host name of OS |
| uname -a | Info of OS |
| uname -m | Hardware name |
| hostname | Ubuntu |
| hostname -a | Alies name of Hostname |
| hostname -f | Fully hostname |
| hostname -i | IP address of the hostname |
| hostname -s | Display the short name |
| who | Who connected to the server |
| who am i | User |
| who -b | System boot time |
| who -d | Dead process |
| who -h | Display heading |
| who -l | Ideal time |
| who -u | list of user login |
| w -V | Display version |
| w | Logged in avg load |
| cal | calendar |
| exit | To exit from the terminal |
| id –u | To check the user id |
| id -g | To check the group id |
Here are some commands which are very much useful command in Linux
- To check the current directories
ls
a.txt corona.txt dumy guru lin poi rajkumar hadoop.2.7.3.tar.gz w.txt
a.txt the one with the white color is text file
dumy the one with blue color is directory
hadoop.2.7.3.tar.gz the one with red color is zip file
Suppose if you want one – by – one then,
ls -1
a.txt
corona.txt
dumy
lin
megha.txt
poi
rajkumar
w.txt
To list out all hidden objects(.)
ls-a
To list out all hidden objects(without . And .. profile)
ls -A
To check in detail about the directories
ls -l
COLUMN FORMATE:
| drwxr-xr-x | permission |
| 2 | link |
| User | username |
| User | Group |
| 892 | Size in bits |
| Dec 29 01:46 | Date and time |
| corona.txt | Object name |
To display the objects which are ends with “ / , @ , * , = ”
ls -F
NOTE:
1) TO CLEAR THE TERMINAL TYPE CLEAR SHORT-CUT KEY IS (CTRL+L)
2) TO EXIT FROM THE TERMINAL TYPR EXIT
list out the objects in reverse order
ls –r
To list out the objects in recursive order
ls –R
To list out objects w.r.t. their modification time
ls -t
list out objects separated by comma,
ls -m
To list out objects in multiple columns
ls -x
list out all objects with inode number
ls -i
To list out display in human readable formate
ls -h
To list out all the objects with 7 column formate w.r.t modification time(t)
ls -lt
To list out all the objects with its size (size in bits)
ls -s
list out all the objects w.r.t size (size in bits)
ls -S
To list out all the objects w.r.t their access time(u)
ls -u
To list out all the objects in reverse order along with 7 column formate w.r.t modification time(t)
ls -lrt
To list out all the objects in reverse order along with w.r.t their access time(u)
ls –lru
To list out all the objects in reverse order along with w.r.t their size(s)
Shapels -lrs
To list out all the objects with 7 column formate w.r.t. their id number and group id number
ls -n
To list out all the objects and hidden file present in entire file system.
ls –lar
LINUX COMMANDS PART- 1
