Shell Script To Display Last Five Lines Of The File
Posted in Academic
Given the filename by the user as the input, write a shell script to display the last five lines of the file.
Shell Script
#!/bin/bash # get filename echo -n "Enter File Name : " read fileName # make sure file exits for reading if [ ! -f $fileName ]; then echo "Filename $fileName does not exists" exit 1 fi # display last five lines of the file using tail command tail -5 $fileName
Command Line Argument
You can read file name as command line argument:
#!/bin/bash # get filename fileName="$1" # make sure command line arg provided if [ -z $1 ]; then echo "Syntax: $(basename $0) filename" exit 1 fi # make sure file exits for reading if [ ! -f $fileName ]; then echo "Filename $fileName does not exists" exit 1 fi # ok display last five lines of the file using tail command tail -5 $fileName
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Tags: command line argument, echo command, exit command, fi, if command, read command, tail command ~ Last updated on: April 12, 2008
