Bash Shell Scripting - "time" Command

The video tutorial explains the 'time' command, which reports system resource usage. It demonstrates how to use the command with a script, showing the real, user, and sys time outputs. The tutorial also covers how to calculate total CPU time by adding user and sys times. It concludes with practical applications of the 'time' command for measuring script execution time.

What is the primary function of the 'time' command?

• To measure network latency

• To schedule tasks for later execution

• To report the summary of system resource usage

• To display the current time and date

In the context of the 'time' command, what does 'real' time represent?

• The time spent in user mode

• The actual elapsed time from start to finish of the script

• The time spent in kernel mode

• The time taken by the CPU to execute the script

What does the 'user' time indicate in the 'time' command output?

• The CPU time consumed in user mode

• The total time taken by the script

• The time spent in kernel mode

• The time taken to execute system calls

How can you calculate the total CPU time consumed by a script using the 'time' command?

• By subtracting 'sys' time from 'real' time

• By adding 'real' and 'sys' times

• By adding 'user' and 'sys' times

• By multiplying 'user' time by 'sys' time

Why might the 'time' command be particularly useful?

• To display the current system uptime

• To determine the fastest network connection

• To measure the time taken by scripts or commands that consume significant resources

• To monitor memory usage