T-SQL: show uptime of SQL server & and status of agent
Interested to see how long your SQL server agent is up and running, or you want to see if that agent is operational? You can use the t-sql code below to find out:
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T-SQL: Top long running SQL statements
The SQL statement below will give you the top 100 longest running SQL statements in your database, sorted by duration.
T-SQL: Find table in complete instance
Looking for a table, but you don’t remember in which database it’s located? The code below will create a stored procedure, which you can use in order to find a table in multiple databases.
T-SQL: Show sizes of all tables in a database
You can use the t-sql code below in order display the size of each table in a specific database.
T-SQL: Kill all connections to a specific database
Sometimes you need to do maintenance on a database, and you don’t really want to use single user mode or disable accounts. In that situation you could kill all connections to a specific database.In order to achieve that, you can use the t-sql code below.
Iptables: redirect port to other IP – port
You can use the following shell commands in order to redirect a port to another port.
Linux: simulate memory usage
Using the “stress” application, you can simulate high memory usage of your system.You may use the following command line:
Mysql: script taking dump of all dbs
T-SQL: create a lock
You can create a temporary lock in T-SQL for -for example- testing:
FFmpeg: decrease size of mp4 file
With ffmpeg you can also decrease the size (aka: quality) of a mp4 file on linux command line.You can use the following example, which will generate a +/- 5Mb file :
Jpegoptim: How to Optimize and Compress JPEG in Linux Commandline
You can optimize Jpeg images on 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: To optimize the jpeg file:
Denyhosts: Add IP to whitelist
Create a file ‘allowed-hosts’ in the ‘work_dir’ (can be found in the denyhosts.conf file), which is /var/lib/denyhosts on Ubuntu, containing the ip.See the example below:
Fail2ban: unblock an ip
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 address is in. To do so, type the following:…
Fail2ban: whitelist an ip
First, edit the config file : vi Then, check the line : ignoreip = Add now add all ip you want. Each IP or range IP must be placed here with a space. Ex: 192.168.0.1 192.168.5.0/32 Save. And restart Fail2Ban: service fail2ban restart
HAProxy: redirect http traffic to https
Within HAProxy it is possible to redirect all http traffic to https.It is sufficient to add the following rule within the frontend section:
HAProxy: redirect http traffic to https
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 https if !{ ssl_fc }
HAProxy: configure transparent proxy
If you configure HAProxy by default, the backends will receive the IP address of the HAProxy as incoming IP address. Some applications (or people) don’t want that. It is possible to configure haproxy as transparent proxy, so that the IP of the client is being used. First of all you…