UNIX for Beginners Questions & Answers

If one argument is supplied, check to see if it starts with a digit, then search for it in the teledir.txt file. If it doesn't exist, echo "Doesn't Exist".


If argument starts with a letter, search for it in the file, If it doesn't exist, echo "Name does not exist" 



If two arguments are supplied, set the search_pattern to be �name: number��, and search it in the file. 
 If it is not found, echo �Adding entry��, and append to the file/variable.
 Otherwise, echo that �Entry exists��

#!/bin/bash

name=$1
number=$2


if [ $# -eq 0 ]; then
        echo "Two arguments are expected in the form of ./scriptname [name number]"
fi

if [ $# -eq 2 ]; then
        grep -qiw "$name\|$number" teledir.txt
        echo "$name or $number exists"
fi

if [[ $somevar == [0-9]* ]]; then

if [[ $somevar == [[:alpha:]]* ]]; then

if [ $# -eq 2 ]; then
        if grep -qiw "$name\|$number" teledir.txt; then
            echo "$name or $number exists"
        fi
fi

#!/bin/bash

name=$1
number=$2

if [ $# -eq 0 ]; then
        echo "Two arguments are expected in the form of ./scriptname [name number]"
fi


if [ $# -eq 1 ]; then
        if grep -qiw "$name | $number" teledir.txt; then
                echo "$name exists"
        else
                echo "Does Not Exist"
        fi
fi

if grep -qiw "$name\|$number" teledir.txt; then

if [ $# -eq 1 ]; then
    if grep -qiw "$name" teledir.txt; then
        echo exists
    else
        echo no exists
    fi
fi

#!/bin/bash
if [ $# -lt 2 ]; then
        echo 2 parameters required
        exit
else
        if [ -z "$1" -o -z "$2" ]; then
                echo The parameter cannot be an empty string
                exit
        fi
        if [ -n "${1//[[:alpha:]]}" -o -n "${2//[0-9-]}" ]; then
                echo Invalid parameters
                exit
        fi

fi

if grep -qiw "$1\|$2" teledir.txt; then
        echo "$1 or $2 exists"
else
        echo "Does Not Exist"
fi

#!/bin/bash

name=$1
number=$2

if [ $# -eq 0 ]; then
        echo "Two arguments are expected in the form of ./scriptname [name number]"
fi


case $name in
        $1)

                if [[ $1 == [[:alpha]]* ]]; then
                        if grep -qiw "$name" teledir.txt; then
                                echo "$name exists"
                        else
                                echo "Name  does NOT exist"
                        fi


                elif [[ $1 == [0-9]* ]]; then
                        if grep -qiw "$name" teledir.txt; then
                                echo "$name  exists"
                       else
                                echo "Number does NOT exist"
                       fi
                fi


esac

name=$1
number=$2
FN=teledir.txt

case  $# in
        1)      if [ ${name%%[[:digit:]]*} ]
                  then  if ! grep -iw "$name:" $FN
                          then  echo "Name doesn't exist."
                        fi
                  elif [ ${name%%[[:alpha:]]*} ]
                    then if ! grep -iw "$name" $FN
                           then echo "$name doesn't exist."
                         fi
                  fi ;;
        2)      grep -qi "$name: $number" $FN &&
                  echo "$name: $number exist" ||
                  echo "$name: $number" >> $FN
                ;;
        *)      echo "Two arguments are expected in the form of ./scriptname [name] [number]";;
esac