grep a space-separated list of string

[roddomi]

Hi,

How can I grep a space-separated list of strings from a file. For example, say I want to find the lines in file.txt that have the strings Monday or Tuesday in it.

LOOKFOR="Monday Tuesday"
grep $LOOKFOR file.txt (this doesn't work)

I tried using grep -F but it requires the list to be separated by newlines (not spaces).

Thanks,

Rodrigo

[scottro]

egrep -i "Monday|Tuesday" filename

Or LOOKFOR="Monday|Tuesday"

egrep -i $LOOKFOR filename

(The -i makes it case-insensitive)