Problem in variable

[RicardoPereira]

I must rename a file using the content of a file.

In my stderr.log i have:
2541

---------------

Now in my script i have the code to get the number:
let NR=`tail -3 /home/xback/dmsbck.info/tmp_dados.info | head -1`


this should get the 2541, but i got the error
bash: let: NR=: syntax error: operand expected (error token is "=")

What should i do to get this number and put in a variable?

Thanks in advanced

 

[cdlvj]

is the "let" valid?

 

[RicardoPereira]

i assume that yes

 

[Chacalinc]

do not use "let", now, if the result of the command is a text use:

NR="[color]`tail -3 /home/xback/dmsbck.info/tmp_dados.info | head -1`"[color]

just in case...