Gawk
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(Difference between revisions)
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== Problems and Solutions == | == Problems and Solutions == | ||
| + | === Get a certain column === | ||
| + | echo one two three | awk '{print $2}' | ||
| - | === | + | === Change the delimiter === |
| + | echo 'this;is;csv' | awk -F\; '{print $2}' | ||
| + | Delimiter can be more than one character, but the whole string must be escaped: | ||
| + | echo 'this@ SEP @is@ SEP @not@ SEP @csv' | awk -F@\ SEP\ @ '{print $2}' | ||
| + | === Get columns from lines matching a pattern === | ||
A small example explains it all: | A small example explains it all: | ||
netstat -s | awk '/active connections/ { print "active.value " $1 } /passive connection ope/ { print "passive.value " $1 } /failed connection/ { print "failed.value " $1 } /connection resets/ { print "resets.value " $1 } /connections established/ { print "established.value " $1 }' | netstat -s | awk '/active connections/ { print "active.value " $1 } /passive connection ope/ { print "passive.value " $1 } /failed connection/ { print "failed.value " $1 } /connection resets/ { print "resets.value " $1 } /connections established/ { print "established.value " $1 }' | ||
Latest revision as of 09:58, 10 April 2009
Contents |
Problems and Solutions
Get a certain column
echo one two three | awk '{print $2}'
Change the delimiter
echo 'this;is;csv' | awk -F\; '{print $2}'
Delimiter can be more than one character, but the whole string must be escaped:
echo 'this@ SEP @is@ SEP @not@ SEP @csv' | awk -F@\ SEP\ @ '{print $2}'
Get columns from lines matching a pattern
A small example explains it all:
netstat -s | awk '/active connections/ { print "active.value " $1 } /passive connection ope/ { print "passive.value " $1 } /failed connection/ { print "failed.value " $1 } /connection resets/ { print "resets.value " $1 } /connections established/ { print "established.value " $1 }'
