Linux command
To view what's written in a file.
cat <filename>
To change the access permissions of files.
chmod <permissions> <file name>
To check which commands you have run till now.
history
To remove a directory/ Folder.
rm -r
To create a fruits.txt file and to view the content.
touch fruits.txt
and to view
cat fruits.txt
Add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava.
echo -e "Apple\nMango\nBanana\nCherry\nKiwi\nOrange\nGuava" > devops.txt
This will create a new file called devops.txt in the current directory and populate it with the list of fruits, with each fruit on a separate line.
The -e option stands for "enable interpretation of backslash escapes".
When used with the echo command, it enables the interpretation of escape characters, such as \n (newline), \t (tab), and others. This allows us to include special characters in the output.
In the example I provided, using -e enables the interpretation of \n, which is used to add a newline character between each color when outputting to the file.
Show only the top three fruits from the file.
head -n 3 devops.txt
This will display the first three lines of the file, which correspond to the first three names in the list.
Show only the bottom three fruits from the file.
tail -n 3 devops.txt
To create another file Colors.txt and to view the content.
touch colours.txt
cat colours.txt
Add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, and Grey.
echo -e "Red\nPink\nWhite\nBlack\nBlue\nOrange\nPurple\nGrey" > Colors.txt
This will create a new file called Colors.txt in the current directory and populate it with the list of colors, with each color on a separate line.
To find the difference between the fruits.txt and Colors.txt files.
diff fruits.txt Colors.txt
This command compares the contents of the two files and shows the differences between them.
Thanks For Reading the Blog.
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