1) To view a single file
Command:
$cat filename
Output
It will show content of given filename
2) To view multiple files
Command:
$cat file1 file2
Output
This will show the content of file1 and file2.
3) To view contents of a file preceding with line numbers.
Command:
$cat -n filename
Output
It will show content with line number
example:-cat-n lpi.txt
1)This is lpi
2)A unique array
4) Create a file
Command:
$ cat >newfile
Output
Will create and a file named newfile
5) Copy the contents of one file to another file.
Command:
$cat [filename-whose-contents-is-to-be-copied] > [destination-filename]
Output
The content will be copied in destination file
6) Cat command can suppress repeated empty lines in output
Command:
$cat -s lpi.txt
Output
Will suppress repeated empty lines in output
7) Cat command can append the contents of one file to the end of another file.
Command:
$cat file1 >> file2
Output
Will append the contents of one file to the end of another file
8) Cat command can display content in reverse order using tac command.
Command:
$tac filename
Output
Will display content in reverse order
9) Cat command can highlight the end of line.
Command:
$cat -E "filename"
Output
Will highlight the end of line
10) If you want to use the -v, -E and -T option together, then instead of writing -vET in the command, you can just use the -A command line option.
Command
$cat -A "filename"
11) Cat command to open dashed files.
Command:
$cat -- "-dashfile"
Output
Will display the content of -dashfile
12) Cat command if the file has a lot of content and can’t fit in the terminal.
Command:
$cat "filename" | more
Output
Will show that much content, which could fit in terminal and will ask to show more.
13) Cat command to merge the contents of multiple files.
Command:
$cat "filename1" "filename2" "filename3" > "merged_filename"
Output
Will merge the contents of file in respective order and will insert that content in "merged_filename".
14) Cat command to display the content of all text files in the folder.
Command:
$cat *.txt
Output
Will show the content of all text files present in the folder.
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