ubuntu1004@ubuntu1004:~$ cat -n replace_end.sh
1 #!/bin/bash
2 echo -n "Type a word:"
3 read text1
4 let len1=${#text1}
5
6 echo -n "Type the end to substitute:"
7 read text2
8
9 let len2=${#text2}
10
11 difference=$len1-$len2
12
13 if [ $len2 -gt $len1 ]
14 then
15 echo "This is not possible!!!"
16 exit
17 else
18 echo "${text1:0:$difference}$text2"
19 fi
ubuntu1004@ubuntu1004:~$ ./replace_end.sh
Type a word:ubuntu1004
Type the end to substitute:0804
ubuntu0804
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