UXPRG05

DATES:

1. Basic Commands
   • Display the PATH setting.
   • Dump the content of a file to the console.
2. File Commands
   • Search a file for a string.
   • Compare two files.
3. Shell Coding Fundamentals
   • Become familiar with the function and purpose of environmental variables.
   • Display and change the values in an environmental variable.
   • Display the values in all environmental variables.
   • Create a file-script which supplies commands and run the script.
4. Bourne Shell Programming
   • Basic elements of a script.
   • Code a simple mathematical expression.
   • Code a basic loop and a conditional termination of the program.
   • The exercise will use two built-in variables.
   • Work with conditional expressions.
   • Code and test a compound conditional if statement.
   • Code and test a nested if statement.
   • Determine whether a user is a superuser.
5. Korn Shell Fundamentals
   • Create a function to display uptime.
   • Code and test the home_space function to display the amount of space each user is using in the home directory.
   • Code and utilize loops in a script.
   • Code logic using a while statement and then convert it to a for statement.
   • Develop techniques for breaking out of a loop.
   • Create and utilize regular expressions.
   • Develop the code for a basic equal string comparison condition.
6. Customizing the Environment
   • Modify the default login to change the command prompt.
   • Explore the content of /etc/profile file.
   • Setup a set of aliases for your personal preference.
7. Korn Shell: Functions, Variables, and Operators
   • Use of parameters and shell variables.
   • Code a routine to determine if a shell variable exists.
   • Code an expression and assign the results to a variable.
   • Write a script that will echo the third parameter; if the parameter is present.
   • Write a script that will recognize whether a word entered from the keyboard starts with an upper or lower case character or a digit.
   • Use the system utilities to perform various file manipulation tasks.
   • Use sed to code a script which will create an extract of a file.
   • Code a script to read a file and display the file with sequence numbers at the end of the line.
   • Code a script to read a file and update specific records in the file.
8. Korn Shell Programming
   • Use regular expressions in a string comparison for locating files with a string containing a pattern.
   • Code scripts for dealing with file searching and manipulation.
   • Search the system for large files and execute a script on each file.
   • Code a script to determine if disk space is running low and memory usage is high.
   • If either condition has occurred, send a message to the system administrator.
   • Append the date and time to the last line of the backup file.
   • Create a script that copies the file /etc/passwd file into the home directory.
   • Append the date and time to the last line of the backup file name.
   • Code a script to display all the usernames on the system and which shell each is using.
   • Given a file of numbers consisting of a single number per line, write a script that will locate the lowest and highest number.
   • Write a script that will first verify if a file exists.