Convert wav files to mp3

When you want to convert a wave file to MP3, one of the simplest ways you’ll find is by using ffmpeg.

If you use Debian, you can install it with:

apt install ffmpeg

If you use Centos you can install it following this steps:

sudo rpm -v --import
yum localinstall nux-dextop-release-0-5.el7.nux.noarch.rpm -y 
yum update
yum install ffmpeg -y

After that, you just need to specify the files input and output names

ffmpeg -i input.wav -acodec mp3 -ab 256k output.mp3



Apache+php-fpm the right way

The simplest, and probably the correct, way to configure php-fpm with apache in Centos 6/7 is by using SetHandler and ProxySet directives.

The snippet bellow show a simple Virtual Host example, just change lines 2 3 and 6 and you are good to go.

<VirtualHost *:80>
    ServerAdmin [email protected]
    Options +Indexes
    DirectoryIndex index.php                                                                                                                    
    DocumentRoot /var/www/html
    # Register php-fpm as the handler for (.*).php files.
    <FilesMatch \.php$>
         SetHandler "proxy:fcgi://localhost:9000"
    # Configure the proxy
    <Proxy fcgi://localhost:9000>
        ProxySet connectiontimeout=5 timeout=240

    # If the php file doesn't exist, disable the proxy handler
    # so we can gracefully fail.
    RewriteCond %{REQUEST_FILENAME} \.php$
    RewriteCond %{DOCUMENT_ROOT}/%{REQUEST_URI} !-f
    RewriteRule (.*) - [H=text/html]

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Install php7.2 CentOS 6.X and 7.X

As PHP versions 5.6 and 7.0 reach End Of Life you might want to update to something newer and supported, unfortunately the official CentOS repositories don’t have PHP versions 7.1 or 7.2 yet, but with a third-party repository and a bit of fiddling it’s easy to update, and more importantly keep it updated, your server PHP version.
Just run as root:
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AWS S3 Backup Guide 2, aws-cli

If you already have aws-cli installed and want to send a file to Amazon S3 it’s really easy:



Sending files ‘by hand’ is all good, but if you are serious about backups you need to automate the process, here is a quick and dirty backup script.
It lists, tars, bzips and individually uploads all the directories under the path you specify o the script.
You just need to set the variables at lines 5, 6, 7 and 8.
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AWS S3 Backup guide 1, bash script

If you don’t have ( or don’t want ) aws-cli installed you can upload files under 5gb with the following script:

# Size limit of 5gb, if you need to upload a bigger file use AWS Cli tools
# $1 Must be the full path of the file
file=$(basename $1)

# S3 authentication information

# as we are uploading a backup the need to be a tar archive
dateValue=$(date -R)

# Signature magic :)
signature=$(echo -en ${stringToSign} | openssl sha1 -hmac ${s3Secret} -binary | base64)

curl -X PUT -T "${file}" -H "Host: ${bucket}" -H "Date: ${dateValue}" -H "Content-Type: ${contentType}" -H "Authorization: AWS ${s3Key}:${signature}" https://${bucket}.${awspath}/${file}

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Disable IPv6 Centos/Debian/Ubuntu

To completely disable IPv6 on your Linux system, side note you shouldn’t but it’s your choice, you can do so simply editing the 99-sysctl.conf file at the location ‘/etc/sysctl.d/99-sysctl.conf’
Copy and paste the following 3 lines at the bottom of the file.

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

After editing the file you need to then reboot the machine or run the following command as root

sysctl -p

To verify that you have ipv6 disabled you can run

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