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How can I remove an SSH key?
I currently have an old SSH key uploaded on a server. The problem is I lost my ~/.ssh directory (with the original id_rsa and id_rsa.pub files).
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The way to check a HDFS directory's size?
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Prior to 0.20.203, and officially deprecated in 2.6.0:
hadoop fs -dus [directory]
Since 0.20.203 (dead link) 1.0.4 and still compatible through 2.6.0:
hdfs dfs -du [-s] [-h] URI [URI …]
You can also run hadoop fs -help for more info ...
Add up a column of numbers at the Unix shell
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391
... | paste -sd+ - | bc
is the shortest one I've found (from the UNIX Command Line blog).
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How can I generate Unix timestamps?
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493
In Linux or MacOS you can use:
date +%s
where
+%s, seconds since 1970-01-01 00:00:00 UTC. ...
Please explain the exec() function and its family
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answered Nov 17 '10 at 13:51
paxdiablopaxdiablo
737k199199 gold badges14241424 silver badges17931793 bronze badges
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What is a monad?
...t an example of method chaining which does not use the monad pattern:
[1,2,3].map(x => x + 1)
The result is [2,3,4]. The code does not conform to the monad pattern, since the function we are supplying as argument returns a number, not an Array. The same logic in monadic form would be:
[1,2,3].fl...
Git: Create a branch from unstaged/uncommitted changes on master
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1232
No need to stash.
git checkout -b new_branch_name
does not touch your local changes. It just...
Disabled UIButton not faded or grey
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edited Jun 23 '15 at 7:35
FormigaNinja
1,54111 gold badge2424 silver badges3434 bronze badges
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How to make the tab character 4 spaces instead of 8 spaces in nano?
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edited Aug 27 '13 at 6:51
answered Mar 12 '13 at 14:50
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Keyword for the outer class from an anonymous inner class [duplicate]
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341
In general you use OuterClassName.this to refer to the enclosing instance of the outer class.
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