bash script for linux (ubuntu)

Exercise(s): 1. Construct a command to remove the duplicates lines in a file. 2. Construct a command to rename all text files(.txt) in a directory 3. Write a script to determine a number is even or odd. The number will be passed as an argument to the script. 4. Write a script to create a log file (.log) based on current date & time. Loop though 1-5000 and write the numbers (one per line) to log file. 5. Write a script that creates an archive (.tar.gz) of log files created before a certain date & time and then delete .log files. 6. Write a script that uses if and for statements to create a diamond pattern on screen (as shown below) based on the number provided by user. Enter Number between (5 to 9) : 6