[HOW TO] fix HAPROXY Setting tune.ssl.default-dh-param to 1024 by default, if your workload permits it you should set it to at least 2048

Error:

Starting haproxy: [WARNING] 052/161359 (16821) : Setting tune.ssl.default-dh-param to 1024 by default, if your workload permits it you should set it to at least 2048. Please set a value >= 1024 to make this warning disappear.

                                                           [  OK  ]

How to resolve:

Step 1: ssh into serverStep 2: use vi to edit haproxy configuration /etc/haproxy/haproxy.cfgStep 3: In global section, add value: tune.ssl.default-dh-param 2048Step 4: Restart haproxy

Tiến Phan - R0039

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[HOW TO] validate haproxy configuration

I just changed haproxy.cfg. I want to ensure haproxy.conf is valid before restarting haproxy service.

So I check haproxy manual

$man haproxy

I see paremetter -c -V and -f which validate the syntax.

Finally I use this to validate

haproxy -c -V -f /etc/haproxy/haproxy.cfg

I hope this helps anyone looking to check the synctax haproxy.cfg

Tiến Phan - R0039

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[HOW TO] determine the serial number of a computer linux

Q: Hello, Do you want help me get the Laptop's serial number?

A: Easy :D wait me 

Q: Nice!

A: Ping ping!!! please open terminal and run below execute command 

"sudo dmidecode -t system | grep Serial"

Q: Thank you so much guys

Tiến Phan - R0039

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[HOW TO] fix Error: xz compression not available

The last week I installed epel7 on CentOS6, and I got this error

Error: xz compression not available

Holy shit, how to solve it?

Simplicity:
yum remove epel-release
yum clean all
yum install epel-release
yum clean all

Tiến Phan - R0039

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