solaris 10 tail variable lines-CodePudding

I previously used ksh for this script. I would create the variable like say LINE=8 and then use tail -$LINE <file> and everything was great. Now I am trying to rewrite this in bash, but still in Solaris 10 bash. No matter how I write this tail line in bash, it is not using the value of the variable:

tail -$LINE <file> = "tail: cannot open input"

tail -${LINE} <file> = "tail: cannot open input"

Anyone have an idea how to cite the variable correctly in Solaris 10 bash so this works correctly?

CodePudding user response：

You could try using cat and pipe it to tail:

cat <filename> | tail -${LINE}

CodePudding user response：

You might get this if the LINE variable contains non-digits: on my Mac

$ LINE=8
$ tail -$LINE .bashrc
[expected contents]

But if add a carriage return to the variable

$ LINE=$'8\r'
$ tail -$LINE .bashrc
tail: option used in invalid context -- 8

Check your script file for \r\n line endings.