Awk: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| (6 intermediate revisions by the same user not shown) | |||
| Line 8: | Line 8: | ||
<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? | |||
<pre> | |||
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 | |||
</pre> | </pre> | ||
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