rm, mv, wc and cp command in Unix Lab (BCA-506P) - Practical-3

 

Execute the following list of basic commands in UNIX:

(i) rm (ii) mv (iii) wc  (iv) cp

(1) rm- 

The rm command in Unix operating systems is used to remove or delete files and directories. It is a powerful command, and you should use it with caution because deleted files and directories are typically not recoverable.

The basic syntax of the rm command is as follows:

                rm [options] [file(s) or directory(ies)]

Options: 

-i (Interactive Deletion): 

This option is used to ask the user for confirmation before removing each file, you have to press y for confirm deletion, any other key leaves the file un-deleted.

 -f (Force Deletion): rm prompts for confirmation removal if a file is write protected. The -f option overrides this minor protection and removes the file forcefully.

(2) mv- 

mv command is used to move existing file or directory from one location to another. It is also used to rename a file or directory. 

The basic syntax of the rm command is as follows:

                rm [options] [file(s) or directory(ies)]

Options: 

-i (Interactive Deletion): 

This option is used to ask the user for confirmation before removing each file, you have to press y for confirm deletion, any other key leaves the file un-deleted.

 -f (Force Deletion): rm prompts for confirmation removal if a file is write protected. The -f option overrides this minor protection and removes the file forcefully.

(3) cp- 

The cp command is used to copy directories and files. The command contains three primary operation modes, represented by the argument types shown to the program to copy a file to other files, multiple files to any directory, or to copy the whole directories to other directories.

The basic syntax of the cp command is as follows:

                cp [options] [source file/directory destination file/directory]

Options: 

-i (Interactive Deletion): 

This option is used to ask the user for confirmation before coping each file, you have to press y for confirm deletion, any other key leaves the file un-deleted.

 -f (Force Deletion): rm prompts for confirmation removal if a file is write protected. The -f option overrides this minor protection and removes the file forcefully.

1. Copy file cmd1.txt in current directory with the name cmd2.txt.

$ cp cmd1.txt cmd2.txt

2. Copy a file cmd1.txt in ‘ankita1’ directory with the same name that is cmd1.txt

                                $ cp cmd1.txt ankita1/

3. Copy a file cmd1.txt in ‘ankita1’ directory with different name

                                  $ cp cmd1.txt ankita1/cmd2.txt

4. Use -i option of cp command for interactive mode to prompt before overwriting an existing file.

                     $ cp -i cmd1.txt cmd2.txt

                    cp: overwrite 'cmd2.txt' ? y

5. Copy multiple files to a specified directory.

                            $ cp cmd1.txt cmd2.txt khushi1/

6. Copy multiple files using wild card. It copies all files with extension .txt to 'deepika1' directory.

                                $ cp *.txt deepika1/