I am trying to read to id_rsa file into a variable var( set var=`cat id_rsa`) in tcsh to provide input to a program. But when i echo the variable ( echo "$var")new lines are gone, its a one line file content. So how do i correctly store and print the variable?
How to read a file into a variable and print it using that variable with exact format in shell
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Don't use tcsh for this task, getting the output of a command into a variable in verbatim is unnecessarily difficult:
Some workarounds if you have to use tcsh are:
use redirection
Store the variable as base-16 (or something else) encoded stuff, so that it doesn't contain any newline characters that will get mangled by tcsh.
Use a tempfile?
... later
I asked a similar question almost a year ago; https://unix.stackexchange.com/questions/284220/tcsh-preserve-newlines-in-command-substitution
In case you're curious this is how you get the verbatim contents (credit Stéphane Chazelas).