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Get date, change format and substring?


 
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# 1  
Get date, change format and substring?

I'm somewhat new to shell scripting and I have a file that had a date in it.

/somedirectory/datefile.txt

I want to take the date in the file: 2013-06-12
and change the formate to 20130612 and have it as a variable/parm

I also what to take that date 2013-06-12
and substring it.

I know the date fuctions, but how to get it to get the date from the file?
# 2  
Assuming bash/ksh93:
Code:
datevar=$(tr -d - < /somedirectory/datefile.txt)
echo ${datevar:0:4}
2013


Last edited by elixir_sinari; 06-13-2013 at 02:55 PM..
# 3  
Is the date the only contents of the file or is it embedded within other data?
# 4  
the date is the only thing in the file.
 

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