getting the uniqueness from extracted grep results BUT with stream as an input
On finished input (like a file) we can do that:
cat file | grep -o memory=[3-9] | sort -u
But sort won't work with a stream:
tail -f server.log | grep -o memory=[3-9] | sort -u
server.log can be an infinite stream (a real time log). Above command can last hours.
how can I aggregate results adding another tool into the pipe,
or making somehow that sort will work?
OR:
what is the alternative, instead of grep, to have grepping there but also passing the argument into next step - next tool of the pipe.
I am not sure if pipe will allow that, at all.
maybe the second part of pipe must be a combined one (like something doing grep+sort at once)
I am only interested with the command-line approach to that.
It could be something like watch, but updating the previous result.
On example:
Instead of seeing a plenty of lines like:
memory=4
memory=4
memory=4
memory=4
memory=2
...
I want to see just:
memory=4
memory=2
The above output is simplified, I wanted to highlight the aggregation of such output is my main problem.
command-line grep streaming pipe
asked Feb 15 at 10:41
Sławomir LenartSławomir Lenart
1113
add a comment |
On finished input (like a file) we can do that:
cat file | grep -o memory=[3-9] | sort -u
But sort won't work with a stream:
tail -f server.log | grep -o memory=[3-9] | sort -u
server.log can be an infinite stream (a real time log). Above command can last hours.
how can I aggregate results adding another tool into the pipe,
or making somehow that sort will work?
OR:
what is the alternative, instead of grep, to have grepping there but also passing the argument into next step - next tool of the pipe.
I am not sure if pipe will allow that, at all.
maybe the second part of pipe must be a combined one (like something doing grep+sort at once)
I am only interested with the command-line approach to that.
It could be something like watch, but updating the previous result.
On example:
Instead of seeing a plenty of lines like:
memory=4
memory=4
memory=4
memory=4
memory=2
...
I want to see just:
memory=4
memory=2
The above output is simplified, I wanted to highlight the aggregation of such output is my main problem.
command-line grep streaming pipe
asked Feb 15 at 10:41
Sławomir LenartSławomir Lenart
1113
add a comment |
On finished input (like a file) we can do that:
cat file | grep -o memory=[3-9] | sort -u
But sort won't work with a stream:
tail -f server.log | grep -o memory=[3-9] | sort -u
server.log can be an infinite stream (a real time log). Above command can last hours.
how can I aggregate results adding another tool into the pipe,
or making somehow that sort will work?
OR:
what is the alternative, instead of grep, to have grepping there but also passing the argument into next step - next tool of the pipe.
I am not sure if pipe will allow that, at all.
maybe the second part of pipe must be a combined one (like something doing grep+sort at once)
I am only interested with the command-line approach to that.
It could be something like watch, but updating the previous result.
On example:
Instead of seeing a plenty of lines like:
memory=4
memory=4
memory=4
memory=4
memory=2
...
I want to see just:
memory=4
memory=2
The above output is simplified, I wanted to highlight the aggregation of such output is my main problem.
command-line grep streaming pipe
asked Feb 15 at 10:41
Sławomir LenartSławomir Lenart
1113
On finished input (like a file) we can do that:
cat file | grep -o memory=[3-9] | sort -u
But sort won't work with a stream:
tail -f server.log | grep -o memory=[3-9] | sort -u
server.log can be an infinite stream (a real time log). Above command can last hours.
how can I aggregate results adding another tool into the pipe,
or making somehow that sort will work?
OR:
what is the alternative, instead of grep, to have grepping there but also passing the argument into next step - next tool of the pipe.
I am not sure if pipe will allow that, at all.
maybe the second part of pipe must be a combined one (like something doing grep+sort at once)
I am only interested with the command-line approach to that.
It could be something like watch, but updating the previous result.
On example:
Instead of seeing a plenty of lines like:
memory=4
memory=4
memory=4
memory=4
memory=2
...
I want to see just:
memory=4
memory=2
The above output is simplified, I wanted to highlight the aggregation of such output is my main problem.
command-line grep streaming pipe
command-line grep streaming pipe
asked Feb 15 at 10:41
Sławomir LenartSławomir Lenart
1113
asked Feb 15 at 10:41
Sławomir LenartSławomir Lenart
1113
edited Feb 15 at 11:02
Sławomir Lenart
asked Feb 15 at 10:41
Sławomir LenartSławomir Lenart
1113
asked Feb 15 at 10:41
Sławomir LenartSławomir Lenart
1113
asked Feb 15 at 10:41
Sławomir LenartSławomir Lenart
1113
1113
add a comment |
add a comment |
1 Answer
1
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oldest
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the working solution is:
$ tail -f infinite_server.log | grep -o memory=[3-9] > output &
then
$ watch "cat output | sort -u"
answered Feb 15 at 11:35
Sławomir LenartSławomir Lenart
1113
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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oldest
votes
the working solution is:
$ tail -f infinite_server.log | grep -o memory=[3-9] > output &
then
$ watch "cat output | sort -u"
answered Feb 15 at 11:35
Sławomir LenartSławomir Lenart
1113
add a comment |
the working solution is:
$ tail -f infinite_server.log | grep -o memory=[3-9] > output &
then
$ watch "cat output | sort -u"
answered Feb 15 at 11:35
Sławomir LenartSławomir Lenart
1113
add a comment |
the working solution is:
$ tail -f infinite_server.log | grep -o memory=[3-9] > output &
then
$ watch "cat output | sort -u"
answered Feb 15 at 11:35
Sławomir LenartSławomir Lenart
1113
the working solution is:
$ tail -f infinite_server.log | grep -o memory=[3-9] > output &
then
$ watch "cat output | sort -u"
answered Feb 15 at 11:35
Sławomir LenartSławomir Lenart
1113
edited Feb 15 at 11:50
answered Feb 15 at 11:35
Sławomir LenartSławomir Lenart
1113
answered Feb 15 at 11:35
Sławomir LenartSławomir Lenart
1113
answered Feb 15 at 11:35
Sławomir LenartSławomir Lenart
1113
1113
add a comment |
add a comment |
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