Android developer

vi filename.txt Press insert button to activate editing mode. To quit without saving :q!   and enter To save file :wq!

Pulling files from server to local machine 1. Cd /home/manoj/workingdir 2. scp -r username@198.168.0.138:/var/www 3. password :******* - r Recursively copy entire directories Transfer file from local machine to server 1. Cd /home/manoj/workingdir 2. scp filename.php username@198.168.0.138:/var/www 3. password :*******

Fetch record in ASC or DESC order  //DECENDING ORDER SELECT * FROM mytablename ORDER BY id DESC  //ASSENDING ORDER SELECT * FROM mytablename ORDER BY id ASC //WITH LIMIT  SELECT * FROM mytablename ORDER BY id DESC LIMIT 50 How to fetch last 50 records from table SELECT * FROM ( SELECT * FROM mytablename ORDER BY id DESC LIMIT 50 )sub ORDER BY id ASC  Update column fields using update commands  UPDATE tablename SET devicemodel='Data what you want to replace' where devicemodel='HUAWEI G730-U00'  Use Delete commands  DELETE FROM Persons WHERE FirstName = 'Peter'