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Java system properties and environment variables
What's the difference between system properties System.getProperties() and environment variables System.getenv() in a JVM?
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How to get the second column from command output?
My command's output is something like:
8 Answers
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diff to output only the file names
I'm looking to run a Linux command that will recursively compare two directories and output only the file names of what is different. This includes anything that is present in one directory and not the other or vice versa, and text differences.
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Ruby - test for array
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There's also is_a? and instance_of?. See stackoverflow.com/questions/3893278/…
– Nathan Long
Mar 21 '11 at 15:57
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Run ssh and immediately execute command [duplicate]
I'm trying to find UNIX or bash command to run a command after connecting to an ssh server. For example:
3 Answers
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Is it possible to perform a 'grep search' in all the branches of a Git project?
...all the branches of a Git control sourced project? Or is there another command to run?
6 Answers
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Android Hello-World compile error: Intellij cannot find aapt
I'm trying to get set up with an Android development environment using IntelliJ in Ubuntu 12.04. I create an Android Application Module, but when I try to build, I get the following error:
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Brew doctor says: “Warning: /usr/local/include isn't writable.”
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Take ownership of it and everything in it.
Mac OS High Sierra or newer: (ty to Kirk in the comments below)
$ sudo chown -R $(whoami) $(brew --prefix)/*
Previous versions of macos:
$ sudo chown -R $USER:admin /usr/local/include
Then do anot...
How to prevent SIGPIPEs (or handle them properly)
...that accepts connections on a TCP or local UNIX socket, reads a simple command and, depending on the command, sends a reply. The problem is that the client may have no interest in the answer sometimes and exits early, so writing to that socket will cause a SIGPIPE and make my server crash. What's th...
How do I expire a PHP session after 30 minutes?
I need to keep a session alive for 30 minutes and then destroy it.
15 Answers
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