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echo line

Bash Remove Last Character From String / Line / Word

I have a file of that looks as follows:

foo bar
tom jerry
UNIX Linux

Each word and/or Linux is a different length. How do strip or remove the last character from each line using bash or ksh shell only on a Linux or Unix-like systems?
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Ksh Read a File Line By Line ( UNIX Scripting )

How do I read a file line by line using KSH shell scripting under UNIX like operating systems?
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BASH: Prepend A Text / Lines To a File

I am a new Unix system user with a bash as a default shell. I can append text to a file using >> operator but how do I prepend a text to a file? I want the opposite operation of >>. How can I prepend some data to a text file?
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