Awk: Difference between revisions
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<pre> | <pre> | ||
echo "a=b=c" | awk -F= '{print $3}' # selects "c" | echo "a=b=c" | awk -F= '{print $3}' # selects "c" | ||
</pre> | |||
Duplicate entries in the passwd file? Compare these: | |||
<pre> | |||
awk -F: '{print $1}' /etc/group | sort -u | wc -l | |||
awk -F: '{print $1}' /etc/group | wc -l | |||
</pre> | </pre> | ||
Revision as of 22:30, 27 June 2011
Pick out the fourth token:
mac=`/sbin/arp -a $ip | awk '{print $4}'`
Separate by = instead of whitespace:
echo "a=b=c" | awk -F= '{print $3}' # selects "c"
Duplicate entries in the passwd file? Compare these:
awk -F: '{print $1}' /etc/group | sort -u | wc -l
awk -F: '{print $1}' /etc/group | wc -l