Linux commands
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(Difference between revisions)
(Created page with '== tcpdump == CDP packets 'ether[20:2] == 0x2000' PPPoE discovery, session packets pppoed pppoes') |
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PPPoE discovery, session packets | PPPoE discovery, session packets | ||
pppoed pppoes | pppoed pppoes | ||
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| + | == awk == | ||
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| + | Sum the numbers in a column | ||
| + | awk '{ SUM += $1} END { print SUM }' | ||
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| + | Get substring of a column | ||
| + | awk '{print $1" " substr($2)}' | ||
Latest revision as of 11:39, 20 December 2010
[edit] tcpdump
CDP packets
'ether[20:2] == 0x2000'
PPPoE discovery, session packets
pppoed pppoes
[edit] awk
Sum the numbers in a column
awk '{ SUM += $1} END { print SUM }'
Get substring of a column
awk '{print $1" " substr($2)}'
