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How do you write a shell script that displays the time every 15 seconds?
Wiki User
∙ 12y ago
Try the following:
while true
do
date
sleep 15
done
Wiki User
∙ 12y ago
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What is the command to execute a shell script?
If the shell script is readable and executable then to execute it just type the name of the shell script file. Otherwise, you can explicity call a shell interpreter to run the file as a shell script, i.e., ksh myfile
Can you execute a shell script if you do not have read permission for the file containing the script?
No, the shell needs both execute and read permissions to run the script.
Can you Write a script shell that displays the list of users along with their number of processes?
Just use the 'PS' command with the option to list processes by user: PS -u john -f would list out the processes running as user 'john'. A shell script to do that could be: #!/bin/ksh for i in $(users) do PS -u $i -f done
Write a shell script to show that user is logged in or not?
You don't need a shell script for that; use either 'whoami' or 'id'
Parse log files-shell script?
There are following shell scripts available at the below mentioned url -1. Shell Script for Log4j Log Analysis and exception reporting2. Log Monitoring Shell Script - email upon errorsHope that's what you are looking for.
What is the Purpose of exit command in Shell of Unix?
The 'exit' command allows you to stop a running shell script at any point and to return a "status" value back to whomever called the shell script. This is a very common practice with shell scripts; sometimes you want to stop the script before it gets to the end of the shell script (for various logic reasons). The 'exit' command also allows you to give a status that any other calling process can use to determine if the shell script ended successfully or not.
How do you compile and run shell script of factorial?
Shell scripts are not compiled; they are interpreted (and therefore do not need to be compiled). Just type in the name of the shell script and any parameters it needs to execute.
How do you write a shell script which counts the last 10 lines present in a given file?
You don't need a shell script to do this - just use the 'tail' command.
What is a .sh file?
A .sh file is a shell script.
How do you indicate a comment line in a shell script?
With the # symbol.
When might it be necessary or advisable to write a shell script instead of a shell function?
A shell function will do nothing unless it is explicitly called by other code, typically in a shell script. A shell script is a runnable, executable process, which can call other shell scripts and/or functions. The question might be worded backwards - it is necessary to write shell functions for shell scripts when certain logical functionality is required to be performed multiple times. Consider a shell function equivalent to a program subroutine - they operate the same way.
What are the two ways you can execute a shell script when you do not have execute access permission for the file containing the script?
To do this you will need at least read permission; if you don't have that then you will not be able to execute the script at all. One way is to copy the script to your directory and add the execute permission. The second way is to call the correct shell interpreter program directly, as in: ksh /some/file/shell
