bash script detect os and execute command

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If you have multi servers Linux Distribution and should check only Ubuntu. Then you can use this script to select the os and if only match the OS then execute the command. 

##!/bin/bash
if [ -e "/etc/issue" ] ;
then
issue=`cat /etc/issue`
set -- $issue
if [ $1 = "Ubuntu" ] ;
then
    nginx -v 2>&1 | grep -o 1.* | cut -c1-6 
fi
fi

apache AH01070: Error parsing script headers

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If you are using Magento 2 and you got this 500 error from admin login page. Your Content Security Policy header are too long. Use Nging or reduce your headers.

Problem is AP_IOBUFSIZE cannot be changed by a conf file it is hardcoded in to the sourcecode. You have only 8192 Bytes and this os offen to low. If you reach this limit your apache willcrash and restart. 

AP_IOBUFSIZE 8192


Look at the Bugzilla from Apache Webserver

https://bz.apache.org/bugzilla/show_bug.cgi?id=64919

php oauth curl request engine

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How to enable php oauth with curl support.

cd/usr/include&& sudoln-s x86_64-linux-gnu/curl

 apt installphp-dev

 apt-installlibpcre3-dev

 apt installphp7.4-dev

apt remove php-oauth php7.4-oauth

apt autoremove

update-alternatives --setphpize /usr/bin/phpize7.4

update-alternatives --setphpdbg /usr/bin/phpdbg7.4

update-alternatives --setphp-config /usr/bin/php-config7.4

pear config-setphp_ini `php7.4 --ini | grep"Loaded Configuration"| sed-e "s|.*:\s*||"` system

pecl installoauth

pecl uninstall oauth

pecl installoauth

printf"; priority=20\nextension=oauth.so\n"> /etc/php/7.4/mods-available/oauth.ini

The Solr *Optimize Now* Button for Sitecore Use Cases

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Sitecore Architecture

If you’ve worked with Sitecore and Solr, you’re no stranger to the Solr Admin UI.  There are great aspects to that UI, and some exciting extension points with Sitecore implications too, but I know one element of that Solr UI that causes some head-scratching . . . the “optimize now” feature:

OptimizeNow.JPG

The inclusion of the badcauses people to think “something is wrong . . . red bad . . . must click now!”

What is this Optimize?

I’m writing this for the benefit of Sitecore developers who may not be coming at this from a deep search background: do not worry if your Solr cores show this badicon encouraging you to optimize now.  Fight that instinct.  For standard Sitecore Solr cores that are frequently updating, such as the sitecore_core_index, sitecore_master_index, sitecore_analytics_index, and — depending on your publishing strategy — sitecore_web_index, one may notice these…

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bash script mysql commands

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I want to use this script to run with Ansible. My requirements were to read the maximum connections in mysql server. Also I want to write the output from mysql client in to a file.

You can use 

mysql -e "show status like 'max_used_connections';" 

Or you can use

mysql <<EOF
tee /tmp/mysql_max.txt
show variables like 'max_connections';
show status like 'max_used_connections';
EOF


output

Logging to file '/tmp/mysql_max.txt'
Variable_name   Value
max_connections 100
Variable_name   Value
Max_used_connections    10

Found here

https://www.shellhacks.com/mysql-run-query-bash-script-linux-command-line/

https://alvinalexander.com/mysql/how-save-output-mysql-query-file/

the ‘information_schema global_status feature is disabled

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If you want to import a MySQL dump in to your MySQL server 5.7 and you got following error

The 'INFORMATION_SCHEMA.SESSION_VARIABLES' feature is disabled; see the documentation for 'show_compatibility_56'

Login in to your mysql root console and send this command to your mysql server

set @@global.show_compatibility_56=ON;

SHOW VARIABLES LIKE '%compatibility%'; 
+-----------------------+-------+ 
| Variable_name         | Value | 
+-----------------------+-------+ 
| show_compatibility_56 | ON    | 
+-----------------------+-------+ 
1 row in set (0.00 sec)