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Home > Forums > Programmers > Languages > AWK Forum

Get second part of line with SEDHelpful Member! 

thread271-1680989
Read More Threads Like This One
blarneyme (MIS)
19 Apr 12 14:34

CODE

cat /etc/*release
Red Hat Enterprise Linux Server release 5.8 (Tikanga)

cat /etc/*release
Red Hat Enterprise Linux ES release 4 (Nahant Update 9)

I want to extract just 5.8 or 4

I have used

CODE

cat /etc/*release | sed 's/\(.*\)\([0-9]\{1\}.?[0-9]\?\)\((.*)\)/\2/'
but it returns the entire line.

CODE

cat /etc/*release | sed 's/\(.*\)\([0-9]\{1\}.\?[0-9]\?\)\(.*\)/\2/'
returns just 8 from 5.8 and 9 from the RHEL 4 line.
blarneyme (MIS)
19 Apr 12 14:43

CODE

cat /etc/*release | sed 's/\(.*\)\([0-9]\{1\}.\?[0-9]\{1,\}\)\(.*\)/\2/'
Correctly returns 5.8 but still returns the entire line for RHEL 4
PHV (MIS)
19 Apr 12 14:54
What about this ?

CODE

sed 's/.*\([0-9]\{1\}\.\?[0-9]*\).*/\1/' /etc/*release

Hope This Helps, PH.
FAQ219-2884: How Do I Get Great Answers To my Tek-Tips Questions?
FAQ181-2886: How can I maximize my chances of getting an answer?

blarneyme (MIS)
19 Apr 12 14:58

CODE

# cat /etc/*release
Red Hat Enterprise Linux Server release 5.8 (Tikanga)
# sed 's/.*\([0-9]\{1\}\.\?[0-9]*\).*/\1/' /etc/*release
8
#

$ cat /etc/*release
Red Hat Enterprise Linux ES release 4 (Nahant Update 9)
$ sed 's/.*\([0-9]\{1\}\.\?[0-9]*\).*/\1/' /etc/*release
9
$
Helpful Member!  PHV (MIS)
19 Apr 12 15:23
And this ?

CODE

sed 's/.* \([0-9]\{1\}\.\?[0-9]*\) .*/\1/' /etc/*release

Hope This Helps, PH.
FAQ219-2884: How Do I Get Great Answers To my Tek-Tips Questions?
FAQ181-2886: How can I maximize my chances of getting an answer?

blarneyme (MIS)
19 Apr 12 15:32
That did it!  Thank you!!!
FlorianAwk (Programmer)
20 Apr 12 13:39
First, the suggested solutions won't work with:
 release 10.1
Or
 release  release 4 (Nahant Update 9 extended)

What about

CODE

sed 's/.*release \([^ ]*\) .*/\1/' /etc/*release
?
 
AnotherAlan (TechnicalUser)
24 Apr 12 10:33
An AWK solution....dont bite, i'm just bored

CODE

awk '{for(i=1;i<NF;i++)if($i=="release") print $(i+1)}' /etc/*release
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