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→LINUX PRACTICE QUESTIONS
# Write code for a Bash shell script that clears the screen, and then prompts the user for their age. If the age entered is less than 65, then display a message that the person is NOT eligible to retire. If the age is equal to 65, then display a message that the person just turned 65 and can retire. If the age is greater than 65, then display the message that the user is over 65 and why have they not have already retired already?<br><br>
# Add code to the script created in the <u>previous</u> question to force the user to enter only an '''integer''' to provide error-checking for this shell script.<br><br>
#Write code for a Bash shell script that will prompt the user for a '''valid POSTAL CODE'''.<br>A valid postal code consists of the following format: '''x#x #x#'''<br>where X '''x''' represents an upper or lowercase letter<br>and '''# ''' represents a number from 0-9<br><br>Also VALID postal codes can consist of no spaces or one or more spaces in the format shown above.<br><br>If the user enters an '''INVALID postal code''', indicate an error and allow the user to enter the VALID postal code. When the user enters a VALID postal code, then clear the screen and display the VALID postal code.<br><br># Write code that works similar to the previous question, but have it read an input file called '''unchecked-postalcodes.txt ''' and only save VALID postal codes to a file called:<br>'''valid-postalcodes.txt'''<br><br>Design your Bash Shell script to only run if the user enters TWO ARGUMENTS:<br>unchecked-postalcodes.txt and valid-postalcodes.txt<br><br>Otherwise, display an error message and immediately exit your Bash Shell script with a false exit value.
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# What is the purpose of the '''/etc/profile''' startup file?<br><br>
