I.T. minded
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.
You can use the following shell commands in order to redirect a port to another port.
Using the “stress” application, you can simulate high memory usage of your system.You may use the following command line:
You can create a temporary lock in T-SQL for -for example- testing:
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 :
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:
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:
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:…
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
Within HAProxy it is possible to redirect all http traffic to https.It is sufficient to add the following rule within the frontend section:
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 }
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…
With the code below, you can set selinux to allow remote backends.
admin@xxx:~/>: psql -p 5555 -U viewuser mcdb mcdb=> Example query: SELECT * FROM “public”.”v_clients”; SELECT v_clients.cid, v_clients.client_name, v_clients.client_addr,v_clients.os_type FROM “public”.”v_clients”; select client_name,status_code,domain FROM v_activities_2 WHERE (status_code=30901 or status_code=30915) and recorded_date_time > current_timestamp – interval ’24 hours’
from : The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large number of tables or partitions. Please simplify the query. If you believe you have received…
You can use Letsencrypt certificates for the Ispconfig admin console too.In order to achieve this, you can use the following commands: