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Not matching files

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# 1  
Old 10-25-2009
Not matching files
Hi
I need to check list of files aganinst a.txt and return those files which are not available in a.txt
Code:
ls -lrt 

file1.txt
file2.txt
file3.txt


a.txt
=====
file1.txt
file2.txt
   
Expecting o/p

file3.txt

Thanks,
Akil
# 2  
Old 10-25-2009
Code:
var="$(ls -lrt folder | awk 'NF>3{print $NF}')";echo "$var" >>a.txt;cat a.txt | sort | uniq -u

result:

Code:
file3.txt

# 3  
Old 10-25-2009
you can use grep
Code:
ls -1|grep -v -f a.txt

# 4  
Old 10-25-2009
Code:
comm -3 <(ls -1) <(sort a.txt)

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