Create file with variable value in Unix

Question

How can I create a file in unix or linux based on variable value ?

Ex:

If I store date in a variable in linux,

YESTERDAY=`date --date='1 day ago' '+%d-%m-%Y'`

it will store value to YESTERDAY as 27-1-2010.

Here I want to create file as name of 27-1-2010,

How can I create file with variable 'YESTERDAY' ?

i want appending operation too. How can i do this ?

Unless you've got a compelling reason (as in, some application already expects this date format), please do it Y-m-d and keep yourself sane. d-m-Y never sorts right, and over time, you'll be very upset.

Dennis Williamson · Answer 1 · 2010-01-28 07:17:24Z

up vote 2 down vote

touch $YESTERDAY

or

echo "something" > $YESTERDAY

to append:

echo "something" >> $YESTERDAY

answered Jan 28 '10 at 5:23

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jrod · Answer 2 · 2010-01-28 05:59:52Z

I don't see anything wrong with echo "foo" >> $YESTERDAY or cat otherfile >> $YESTERDAY

What are you trying to cat? Or alternately what are you trying to put into the file called 27-1-2010?

Rory · Answer 3 · 2010-01-28 10:41:46Z

up vote 0 down vote

You can use the variable $YESTERDAY in commands. Like touch $YESTERDAY, mv original_file $YESTERDAY

answered Jan 28 '10 at 10:41

Rory
4,58273992

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Kumar P · Answer 4 · 2010-02-02 04:43:27Z

up vote 0 down vote accepted

YESTERDAY=date --date='1 day ago' '+%d-%m-%Y'

cat >> $YESTERDAY

It too working well with appending operation

answered Feb 2 '10 at 4:43

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4 Answers