apt-get add new data source
[crayon-6870c389ead3e921704092/] we got some errors below: [crayon-6870c389ead43212158479/] Fix: [crayon-6870c389ead45694274023/] If we receive an error like below, it looks like you…
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How to read rrd file?
[crayon-6870c389eb07a780537284/] [crayon-6870c389eb07d172627755/] this command will get the avg value of ds1 (ds1 is the dataset – you can see…
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Ubuntu 18.04 : how to run start up script
Create a service: [crayon-6870c389eb18b908768639/] Add your code there: [crayon-6870c389eb18e419556506/] Create and make sure /etc/rc.local is executable and add this code inside it:…
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Strongswan: allow client to access internet
2 sites vpn works well, they can see each other. but i want to send all internet from my remote…
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How to use and exit minicom ?
minicom -s (this is to configure the terminal) to exit minicom Press Ctrl – A , select Z , select…
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Nagios: Sorry, but Nagios is currently not checking for external commands, so your command will not be committed!
When you tried to stop Nagios to monitor some services from web interfaces – you see the message below: Sorry,…
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/usr/bin/python^M: bad interpreter: No such file or directory
it’s because the new line difference between Unix and windows , the easiest fix it run this command [crayon-6870c389eb4e3094461172/]
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WordPress is slow: wp-captcha-booster – tech-banker-service
I just found out that i could not access my wordpress today, i checked the server, everything looked good. i…
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Linux: crontab syntax check
The folder /etc/cron.d/ is used to store all cronjobs, the cronjob is saved on the file , the format is:…
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Ubuntu: Check disk heath – smartctrl and smartmontools
smartctl is a nice tool to check your hard disk health – it will let you know how many hours…