Easy tricks for your needs...
01. Remove duplicate entries (line) from the text file in Ubuntu sort random.txt | uniq -u > rand-shorter.txt 02. Change the folder tree rights to 777 in Ubuntu chmod -R 777 my_folder_name 03. MySQL data export to the database from sql file mysql -uroot -p -h localhost mydb < mydbbackup.sql 04. Find the running port number for given process in ubuntu ps -ax|grep process_name example: ps -ax|grep java will list out all the process having name java 05. Kill running process kill -9 12344 (Here 12344 is process number given by "ps -ax|grep myprocess" command) 06. Kill a process for know port sudo lsof -t -i:<port-number> Example: sudo lsof -t -i:9000 The result would be the process number. Then use " kill -9 <process-number >" to kill the process. Please see the (05) of the above.