git-task/linux-commands.txt at main · sersheed/git-task · GitHub

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#- date
#- cal
a- cal 2018
b- cal 12 2018
#- clear
clears screen.
#- ls - list directory contents
a) ls -l or ll
To list files in the current directory with detailed
info.
b) ls -lt
To list files in the current directory with detailed info sorted by
date and time with the newest file first.
c) ls -lh
To list files in the current directory with their
size in human readable format.
d) ls -la
To list all files including the hidden files with
detailed info.
e) ls -ltr
To list files in the current directory with detailed info sorted by
date and time with the newest file first.
#- PWD
Print working directory or your current location.
#- CD
Change directory.
a- cd  /usr/bin
b- cd  ~ or cd takes your user's home directory
c- cd ~user (another users's home directory)
d- cd /
e- cd -   (takes you to the previous directory)
f- cd ..  (go up one level)


Compression Tools:

- Compression tools are used to compress one or

more files or an archive to save space.

#- gzip

This command creates a compressed file of each of the

files specified and adds .gz extension to the files.

#- gzip filename

#- ls or ll (check files after compression)


- To uncompress use:

#- gunzip filename

or

#- gzip -d filename

# ls or ll (check files after decompression)

You can also use bzip2 and bunzip2

#- bzip2 filename

#- bunzip2 filename or bzip2 -d filename


cat /etc/profile

Displays the contents of the file profile.

- Using more and less command:

Examples:

#- more /etc/profile

Displays long text files one page at a time, starting

at the beginning.

- Use spacebar to scroll forward one screen at a time.

- Use Enter to scroll one line at a time.

#- less /etc/profile

Similar to more command but offers some extended

capabilities, it is also faster than more as it does

not need to read the entire file before it starts to

show.

#- rm file1

Remove file.

#- rm -i file2

To remove file with confirmation.

#- rm -f file

To remove file forcefully (no confirmation).

- Removing directories:

#- rmdir dir1

To delete an empty directory.

#- rm -r dir1

To delete a non empty directory recursively.

$- rm -rf dir1

To remove a directory recursively and forcefully.