RE: How to use temporary files?

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>Because I want to:
>
>  grep $i /etc/passwd || grep $i passwd.new >> /etc/passwd
>
>in the passwd, group, shadow, etc files. This lets me test if they're 
>already there and add them if not, preventing duplicate entries.

FYI: You should use useradd (groupadd) to portably create accounts.
useradd will fail if the account exists.  You still have an issue: 
if there's a chance the account was created by something else, you 
need a way to know whether userdel (groupdel) it on package
removal - same problem you have now with manually adding entries.




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