String to variable in bash

[Senplanet]

Hello,
I have a set of files which name looks like this:
fnl_20100610_00_00_c
fnl_20100610_06_00_c
fnl_20100610_12_00_c
................................
Now I would like to read just part of the file name (00;06;12;.....etc) and use as variable in "if" statement. I tried:
echo $dhm | cut -d'_' -f3 >This can take the wanted part and print out. So I tried create a variable "i" :
i=$dhm | cut -d'_' -f3 > Doesnt work. I tried several combinations but couldnt fix it yet. It seems to be just simple task but I have no idea. Please, can someone give some suggestion here?

[Arndt]

Hello,
I have a set of files which name looks like this:
fnl_20100610_00_00_c
fnl_20100610_06_00_c
fnl_20100610_12_00_c
................................
Now I would like to read just part of the file name (00;06;12;.....etc) and use as variable in "if" statement. I tried:
echo $dhm | cut -d'_' -f3 >This can take the wanted part and print out. So I tried create a variable "i" :
i=$dhm | cut -d'_' -f3 > Doesnt work. I tried several combinations but couldnt fix it yet. It seems to be just simple task but I have no idea. Please, can someone give some suggestion here?

I think you want


i=`echo $dhm | cut -d'_' -f3`

[ofnuts]

Hello,
I have a set of files which name looks like this:
fnl_20100610_00_00_c
fnl_20100610_06_00_c
fnl_20100610_12_00_c
................................
Now I would like to read just part of the file name (00;06;12;.....etc) and use as variable in "if" statement. I tried:
echo $dhm | cut -d'_' -f3 >This can take the wanted part and print out. So I tried create a variable "i" :
i=$dhm | cut -d'_' -f3 > Doesnt work. I tried several combinations but couldnt fix it yet. It seems to be just simple task but I have no idea. Please, can someone give some suggestion here?
Besides the echo/cut method, in bash you can also extract substrings using brace expansion:

->x="abcdefghi"
->echo ${x:3:4}
defgSee: http://www.gnu.org/s/bash/manual/bash.html#Shell-Parameter-Expansion

[Vaphell]

I think you want


i=`echo $dhm | cut -d'_' -f3`

backticks are passe ;-), use $() instead

[Senplanet]

hmmm. That was really simple, Thanks