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How to send only one UDP packet with netcat?
... -q1 option on my netcat. Instead I used the -w1 option. Below is the bash script I did to send an udp packet to any host and port:
#!/bin/bash
def_host=localhost
def_port=43211
HOST=${2:-$def_host}
PORT=${3:-$def_port}
echo -n "$1" | nc -4u -w1 $HOST $PORT
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Add only non-whitespace changes
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I agree with Colin. If the script works, then there should be no need to create a stash. What might be good to consider though would be to run stash, then stash pop. Popped stashes can be recovered if necessary, but you won't end up with a lot of stash...
Where does Jenkins store configuration files for the jobs it runs?
...nkins installation folder, you could create a simple jenkins job and run a script that tars all the config files for the jobs: "tar -zcvf jenkins-jobs-configs.tar.gz $(find ${JENKINS_HOME}/jobs -name config.xml -maxdepth 2) ". You could then archive jenkins-jobs-configs.tar.gz
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What is the “-d” in “npm -d install”?
...argument. For example, this issue refers to doing npm -d install coffee-script . There are a few other pages that also refer to this syntax, including the install instructions for at least one npm package.
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Remove a character from the end of a variable
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Use target=${1%/}
See this the parameter substitution of this bash scripting guide for more.
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Circle drawing with SVG's arc path
...plicity is the main advantage over the multiple-arc-path method (e.g. when scripting you only plug in one value and you're done for any arc length)
The arc starts at the rightmost point, and can be shifted around using a rotate transform.
Note: Firefox has an odd bug where rotations over 90 degree...
Creating an empty file in Ruby: “touch” equivalent?
... When is "at some point" going to happen? At the end of the script, or immediately because it hasn't been assigned to any variable? I'm creating the file so other processes on the system can start working with it immediately, and they will be blocked if the file handle is still open f...
Query grants for a table in postgres
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Here is a script which generates grant queries for a particular table. It omits owner's privileges.
SELECT
format (
'GRANT %s ON TABLE %I.%I TO %I%s;',
string_agg(tg.privilege_type, ', '),
tg.table_schema,
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How to make a website secured with https
...ote that you'll also need to allow anonymous access to any style sheets or scripts that are used by the anonymous pages:
<!-- Anonymous folders -->
<location path="styles">
<system.web>
<authorization>
<allow users="*" />
</authorization>
</system.web...
Setting a system environment variable from a Windows batch file?
...e to directly set it in the setting process too (works for me perfectly in scripts that do some init stuff after setting global variables):
SET XYZ=test
SETX XYZ test
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