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cat command in Linux

cat : cat  command is used to create ,red and modify the file.

• To create a file
• Syntax : cat  >  <file name>
• Example : cat  >  test.txt
  Hello World
  Ctrl+d (To save and exit the file)

• To Red the file
• Syntax : cat <file name>
• Example : cat test.txt
  Hello World
• To Modify the file.
• Syntax : cat  >>  <file name >
• Example : cat  >> test.txt
  Hello World 1
  Ctrl+d (To save and exit the file)

• To see contents of file in line by line.
• Syntax : cat -n <file name>
• Example : cat -n test.txt
      1 Hello World
      2 Hello World 1

• Note :  If you using single > singe the cat command will delete previous  data and add new data.

• To see contents of two or more then two file with cat command.
• Syntax : cat  <file name>  <file name>
• Example : cat  test.txt  test1.txt

• Use less with cat command.
• Syntax : cat  <file name> | less
• Example : cat  test.txt |  less

• Use More with cat command.
• Syntax : cat   <file name> | more
• Example : cat  test.txt |more.