File Management in Bash : Commands and Examples

File management is one of the most common and fundamental task in everyday life. In this tutorial we will see how actually we can manage files using bash terminal.

Using Bash we can do so many things, Example, We can organise files, automating file operations, permissions management and processing in directories.

Let’s see some of the common things like creating, copying , moving and deleting files in directory.

1. Creating Files and Directory

Creating Files with Touch

Touch command is used for creating an empty file or updating existing timestamps of file.

touch filename.txt

Creating Directory with mkdir command

The mkdir command creates a new director.

mkdir new_directory

If you want to create parent directory as well then use this command. Flag -p is required.

mkdir -p parent_directory/child_directory

2. Copying Files and Directories

For copying file from one location to another location we used cp command.

cp file.txt /path/to/destination/

Also, you can copy multiple files.

cp file1.txt file2.txt /path/to/destination/

Copying Directories with cp -r command

The -r stands for recursive, It is very helpful for coping directories with their content.

cp -r source_directory /path/to/destination/

3. Moving and Renaming files

Moving files with mv

The mv command is very useful for moving files from one directory to another. Also we can rename the directory with this command.

mv file.txt /path/to/destination/

Renaming Files

As you know we can rename file using mv command but we have to specify new name at the end.

mv old_filename.txt new_filename.txt

4. Deleting Files and Directories

Deleting files with rm

rm command used for delete the file or files. (Caution – If we removed files using rm, Then it is very hard to recover)

rm filename.txt

Deleting Directories using rm -r

As you know -r stands for recursive, So we can delete files and content recursively.

rm -r directory_name

For deleting forcefully any directory or files we can below command

rm -rf directory_name

5. Checking file information

Listing files

The ls command list the files and directory of the current directory.

ls

For more details like permission, size or date we can use below command

ls -l

File size checking using du

The du command estimates files and directory memory usage.

du -h filename.txt

6. Changing file permissions and ownership

Modify permission using chmod

chmod command can change the file permissions. Example: Giving read and write permission to owner and read permission for rest of the user.

chmod 644 filename.txt

Changing ownership with chown

The chown command is useful for changing ownership.

chown user:group filename.txt

Conclusion

So, That’s it from my side. I hope you liked my shorter way of explanation. In upcoming article I will talk about bash text processing conecpt.