Lab 1-2 Shell Script Assignment and Solution

Lab 1-2 Shell Script Requirement

Lab 1-2 Shell Script Solution

#!/bin/bash

# Script started on Tue Apr 23 00:12:09 2013

# [testuser@abc ~]$ ls -l cis18cLabLink

# lrwxrwxrwx 1 testuser unixStudent 34 Apr 23 00:12 cis18cLabLink -> /home/distribution/cnguyen/cis18c/

# [testuser@abc ~]$ echo Found $(grep 'testuser' /etc/passwd | cut -f5 -d':') among $(wc -l /etc/passwd | cut -f1 -d' ') entries of /etc/passwd

# Found Test User among 1624 entries of /etc/passwd

# [testuser@abc ~]$ whereis -b tcsh | cut -f2 -d':'

#  /bin/tcsh

# [testuser@abc ~]$ ls -a | grep '^\.[^.]' | wc -l

# 8

# [testuser@abc ~]$ cp cis18cLabLink/clean.sed .

# [testuser@abc ~]$ echo 's/^/# /' >> clean.sed

# [testuser@abc ~]$ exit

# exit

# 

# Script done on Tue Apr 23 00:12:59 2013

echo There are $(finger | cut -f1 -d' ' | uniq | tail -n +2 | wc -l) uniq users currently logged in

# Prompt the user and read in a number, which will be used as the number of minutes in the script

echo -n "Enter the number of idle minutes (0-60): "

read idleMinutes

echo These users are in idle for more than $idleMinutes minutes

# Print to screen the user id and the idle time of users who have been idle for more than the given minutes.

finger | tail -n +2 | awk -F ' ' '($(NF-4)) ~ "^[^p]" {if($(NF-4) > '$idleMinutes') print $1F " " $(NF-4); else if(substr(($(NF-4)), 2,1) == ":")print $1F " " $(NF-4); else if(substr(($(NF-4)), 3,1) == ":") print $1F " " $(NF-4)}'