Before executing these commands make sure you are in the public_html folder of the application you want to make changes to.
Delete a Folder or File
Delete/Remove a Folder: rm -r FolderName
Delete/Remove a File: rm -r FileName
Backup a SQL Database Quickly
Export the Database: mysqldump -uUSERNAME -p DATABASENAME > backup.sql
* USERNAME is the database username and DATABASENAM is the database name. backup.sql can be renamed to whatever your backup to be called. It will dump the backup into the public directory of your website.
Import a SQL Database from Command Line
mysql -u username -p database_name < database_file.sql
*Replace username with the database username, database_name with the name of your database and database_file.sql with the file name.
Compress A Folder
zip -r filename.zip foldername
*filename is the name of the file you want to output the compression to and foldername is the name of the current directory you want to compress