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How can I do division with variables in a Linux shell?
...will be:
x=20; y=3;
calc $x/$y
or if you prefer, add this as a separate script and make it available in $PATH so you will always have it in your local shell:
#!/bin/bash
calc(){ awk "BEGIN { print $* }"; }
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CATALINA_OPTS vs JAVA_OPTS - What is the difference?
...nd JAVA_OPTS - which are both used in the catalina.sh startup and shutdown script for Tomcat. They are described in comments within that file as:
[JAVA_OPTS]: (optional) Java runtime options used when the "start", "stop" or "run"
command is executed
and
[CATALINA_OPTS]: (optional) Java ...
How SignalR works internally?
...equest limit of the IIS. It can be increased using config entries or shell scripts. Usually Signalr caches 1000 connectiosn in memory.
– Thanigainathan
Jan 28 '14 at 21:24
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How many characters can UTF-8 encode?
...nes of Unicode, which include less common CJK characters, various historic scripts, mathematical symbols, and emoji (pictographic symbols).
source: Wikipedia
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Specify pane percentage in tmuxinator project
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Some may find this command useful in scripts to just print the layout portion: tmux list-windows | sed -n 's/.*layout \(.*\)] @.*/\1/p'
– Nathanael
Jun 6 '18 at 11:10
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What is the difference between re.search and re.match?
...function if you compare the same regular expression. You can check in your script by comparing re.search('^python', word) to re.match('python', word) (or re.match('^python', word) which is the same but easier to understand if you don't read the documentation and seems not to affect the performance)
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What does it mean that Javascript is a prototype based language?
One of the major advantages with Javascript is said to be that it is a prototype based language.
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How to create nonexistent subdirectories recursively using Bash?
I am creating a quick backup script that will dump some databases into a nice/neat directory structure and I realized that I need to test to make sure that the directories exist before I create them. The code I have works, but it seems that there is a better way to do it. Any suggestions?
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os.path.dirname(__file__) returns empty
..._file__))[0]
os.path.realpath(__file__)return the abspath of the current script; os.path.split(abspath)[0] return the current dir
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What are the respective advantages/limitations of Amazon RDS vs. EC2 with MySQL? [closed]
... The other solution was to use a 3rd party tool that creates a massive SQL script (on the app server) that will recreate the schema and populate the data back to a restore point.
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