tac command in Linux with Examples

                                             Tac Command

    tac command in Linux is used to print files in reverse. When no file is specified then this command will read the standard input.

 Example for tac command

1. Create a file by using cat command.

[root@localhost ~]# cat > file1
welcome to linux
Thanks for visiting our channel

2. Check the file the data is available are not.

[root@localhost ~]# cat file1
welcome to linux
Thanks for visiting our channel

3. tac command will print the output in reverse.

[root@localhost ~]# tac file1
Thanks for visiting our channel
welcome to linux 

     

    You can use this tac command in all Linux flavors like redhat, ubuntu, kali linux, linux mint, debian, manjaro, arch linux, opensuse, centos, etc.

Cat Command in Linux / Unix

                                 Cat Command

Cat means "concatenate files and print on the standard output"

• By using cat command you can create, read, append the data to the file.

• You can use this cat command in all Linux flavors like redhat, ubuntu, kali linux, linux mint, debian, manjaro, arch linux, opensuse, centos, etc. 

  Some examples for cat command
  
  1. Create a file by using cat command.
  
  [root@localhost ~]# cat > file1
  welcome to linux
  
  Note: to save the file use Ctrl + d
  
  2. Read a file by using cat command.
  
  [root@localhost ~]# cat file1
  welcome to linux
  
  3. Append the data to a file by using cat command.
  
  [root@localhost ~]# cat >> file1
  Thanks for visiting our channel
  
  4. Check the file the data is available are not.
  
  [root@localhost ~]# cat file1
  welcome to linux
  Thanks for visiting our channel