Awk: Difference between revisions
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Duplicate entries in the passwd file? | Duplicate entries in the passwd file? | ||
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awk -F: '{print $1}' /etc/passwd | sort -u | wc -l > temp1 | awk -F: '{print $1}' /etc/passwd | sort -u | wc -l > temp1 | ||
Latest revision as of 17:47, 19 April 2018
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?
awk -F: '{print $1}' /etc/passwd | sort -u | wc -l > temp1
awk -F: '{print $1}' /etc/passwd | sort | wc -l > temp2
diff temp1 temp2
rm temp1 temp2