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Best way to simulate “group by” from bash?
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And sort ip_addresses | uniq -c | sort -nr | awk '{ print $2, $1 }' to get the ip address in the first column and count in the second.
– Raghu Dodda
Sep 19 '16 at 22:25
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How do I check if a variable exists in a list in BASH
...amp; echo 'yes' || echo 'no'. it's correct assuming space is the separator and $x doesn't contain space
– Tianren Liu
Apr 5 '16 at 21:47
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scp with port number specified
...lt
The lowercase p switch is used with scp for the preservation of times and modes.
Here is an excerpt from scp's man page with all of the details concerning the two switches, as well as an explanation of why uppercase P was chosen for scp:
-P port Specifies the port to connect to on the r...
Can the Unix list command 'ls' output numerical chmod permissions?
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For creating it as an alias (example below: 'cls' command), use: alias cls="ls -l | awk '{k=0;for(i=0;i<=8;i++)k+=((substr(\$1,i+2,1)~/[rwx]/)*2^(8-i));if(k)printf(\"%0o \",k);print}'"
– danger89
Mar 6 '14 at 16:15
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Is there a Python caching library?
...nything so far. I need a simple dict -like interface where I can set keys and their expiration and get them back cached. Sort of something like:
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Div height 100% and expands to fit content
...The height of the body is also set to 100%. The inner div has a background and all that and is different from the body background. This works for making the div height 100% of the browser screen height, but the problem is I have content inside that div that extends vertically beyond the browser scre...
How can I start an interactive console for Perl?
How can I start an interactive console for Perl, similar to the irb command for Ruby or python for Python?
23 Answers
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AddRange to a Collection
...int about the get-only property, which prevents solutions like doing Union and reassigning.)
8 Answers
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How to count the frequency of the elements in an unordered list?
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@unutbu: What if I have three lists, a,b,c for which a and b remain the same, but c changes? How to count the the value of c for which a and c are same?
– Srivatsan
Jun 29 '14 at 12:31
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POSTing JsonObject With HttpClient From Web API
... using HttpClient from Web API. I'm not quite sure how to go about this and can't find much in the way of sample code.
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