Remove Last Digit In The Text File

Suppose we have a text file contain like this :

tedy@tedy-laptop:~$ cat temp.txt
6287756200410 
6281803360820 
6281938729213 
6287841613739 
6281703456007 
6287756236052 
6281907128431
tedy@tedy-laptop:~$ 

If we want to remove three digits from each line, we can use the following command :

tedy@tedy-laptop:~/Desktop$ cat temp.txt | sed -e 's/...$//g' 
6287756200 
6281803360 
6281938729 
6287841613 
6281703456 
6287756236 
6281907128  
tedy@tedy-laptop:~$

If we want to remove six digits from each line, we can use the following command :

tedy@tedy-laptop:~/Desktop$ cat temp.txt | sed -e 's/......$//g' 
6287756 
6281803 
6281938 
6287841 
6281703 
6287756 
6281907 
tedy@tedy-laptop:~$ 

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