Latest Posts
📅 2017-11-14
✍️ Bart Schelstraete
Using the "stress" application, you can simulate high memory usage on your system. You may use the following command line: stress --vm-bytes $(awk '/MemFree/{printf "%d\n", $2 * 0.9;}' <…
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📅 2017-08-16
✍️ Bart Schelstraete
#!/bin/sh set -o pipefail PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin #--------------------------------------------------- # (1) set up all the mysqldump variables…
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📅 2017-08-14
✍️ Bart Schelstraete
You can create a temporary lock in T-SQL for — for example — testing: BEGIN TRAN SELECT 1 FROM TABLE WITH (TABLOCKX) WAITFOR DELAY '00:02:00' ROLLBACK TRAN GO
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📅 2017-08-09
✍️ Bart Schelstraete
With ffmpeg you can also decrease the size (aka quality) of an mp4 file on the Linux command line. You can use the following example, which will generate a +/- 5MB file: ffmpeg -i original.mp4 -fs 5M…
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📅 2017-08-09
✍️ Bart Schelstraete
You can optimize JPEG images on the Linux command line (= reduce the size to load images faster). In order to achieve that, you can make use of the 'jpegoptim' application. On Ubuntu/Debian systems:…
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📅 2017-08-07
✍️ Bart Schelstraete
Create a file 'allowed-hosts' in the 'work_dir' (which can be found in the denyhosts.conf file), located at /var/lib/denyhosts on Ubuntu, containing the IP addresses. See the example below: cat <>…
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📅 2017-08-07
✍️ Bart Schelstraete
Find IP Address to Unblock Log in to your server via SSH and type in the following command: iptables -L -n Look for the IP address you want to unblock / unban. Now we must find the jail name this IP…
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📅 2017-08-07
✍️ Bart Schelstraete
First, edit the config file: vi /etc/fail2ban/jail.conf Then, check the line: ignoreip = Now add all the IPs you want. Each IP or IP range must be placed here separated by a space. Ex: 192.168.0.1…
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📅 2017-08-04
✍️ Bart Schelstraete
Within HAProxy it is possible to redirect all HTTP traffic to HTTPS. It is sufficient to add the following rule within the frontend section: frontend incoming80 bind 10.1.1.13:80 redirect scheme…
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📅 2017-08-04
✍️ Bart Schelstraete
Within HAProxy it is possible to redirect all HTTP traffic to HTTPS. It is sufficient to add the following rule within the frontend section: frontend incoming80 bind 10.1.1.13:80 redirect scheme…
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