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What is the regular expression for REVERSE of five consecutive nubmers

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Top Forums Shell Programming and Scripting What is the regular expression for REVERSE of five consecutive nubmers
# 1  
Old 09-24-2009
What is the regular expression for REVERSE of five consecutive nubmers
Hi , we all know that the regex for five consecutive number is [0-9][0-9][0-9][0-9][0-9]

But what is the regex for "anything but five consecutive numbers"

I want to use an awk script to replace anything but five consecutive numbers with blank, so that 3423ljljaj43222jkjlj2fasd becomes 43222
# 2  
Old 09-24-2009
you can use grep for that.

Code:
grep -Ev '[0-9]{5}' file

or

Code:
echo $var | grep -Ev '[0-9]{5}'


for awk, you can negate the condition.

Code:
$0 !~ /regex/

# 3  
Old 09-24-2009
try this

Code:
awk -F[a-z]+ '{print $2}' file

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