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HMAC-SHA1 in bash
... should already be installed (or easily installed) in your choice of Linux/Unix, Cygwin and the likes.
Do note that older versions of openssl (such as that shipped with RHEL4) may not provide the -hmac option.
As an alternative solution, but mainly to prove that the results are the same, we can ...
Is there any way to kill a Thread?
...n program, and main programs can be killed abruptly by the user (Ctrl-C in Unix, for instance)–in which case they try to handle this possibility as nicely as possible. So, I fail to see what is special with threads, and why they should not receive the same treatment as main programs (namely that ...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...n't care about portability (these solutions should work on pretty much any UNIX box), Linux' fuser(1) offers some additional options and there is also flock(1).
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Django FileField with upload_to determined at runtime
... to use os.path.join instead of '/'.join to make sure it also works on not-Unix systems. They may be rare, but it's good practice ;)
– Xudonax
Feb 4 '14 at 14:26
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How can I tell if my server is serving GZipped content?
...impress one thing on my younger devs, its the importance of having a solid unix foundation. +1 for CURL. Its confusing at first, a life saver when you know it.
– Akron
Apr 12 '19 at 17:43
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What's the difference between getPath(), getAbsolutePath(), and getCanonicalPath() in Java?
...the path, removing and resolving stuff like ..\ and resolving symlinks (on unixes).
Also note the following example with nio.Paths:
String canonical_path_string = "C:\\Windows\\System32\\";
String absolute_path_string = "C:\\Windows\\System32\\drivers\\..\\";
System.out.println(Paths.get(canonica...
What are the special dollar sign shell variables?
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@amc: See unix.stackexchange.com/questions/271659/… for differences between !$ and $_.
– tricasse
Apr 20 '17 at 17:54
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git - merge conflict when local is deleted but file exists in remote
...If you're having a problem figuring out how to use shell wildcards, ask on unix.stackexchange.com. If you know for a fact that what you want can't be done with globbing, use rm -i and follow with git add -u to pick up the deletions.
– Cascabel
Oct 18 '11 at 21:...
warning: [options] bootstrap class path not set in conjunction with -source 1.5
...sr/lib/jvm/java-7-oracle/jre/lib/rt.jar \
-source 1.7 Main.java
On UNIX systems, locate rt.jar using:
locate -r '/rt.jar$'
Set JAVA_HOME so that rt.jar is located at $JAVA_HOME/jre/lib/rt.jar, then:
javac -source 1.7 -bootclasspath "$JAVA_HOME/jre/lib/rt.jar" Main.java
Tested on Ubuntu...
Get Image size WITHOUT loading image into memory
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Another short way of doing it on Unix systems. It depends on the output of file which I am not sure is standardized on all systems. This should probably not be used in production code. Moreover most JPEGs don't report the image size.
import subprocess, re
i...