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February 5, 2019

How to exclude subfolder from password protection with .htaccess

Filed under: Linux — Tags: , , , , , — admin @ 1:38 pm

So if you want to protect a website with .htaccess and .htpasswd basically you will use

AuthType Basic
AuthName “Password Protected Area”
AuthUserFile /path/.htpasswd
Require valid-user

If you want a subdirectory to be excluded from auth like .well-known , for lets encrypt then a easy way it to create a .htaccess on .well-known directory and place in it

Satisfy any

January 24, 2019

Ubuntu rc-local

Filed under: Linux — Tags: , — admin @ 11:55 am

On a ubuntu 18 I try to reboot a service after it start so I was try to use rc.local but this is no longer there .

So you create this file

/etc/systemd/system/rc-local.service

You add into it this

[Unit]
Description=/etc/rc.local Compatibility
ConditionPathExists=/etc/rc.local

[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSec=0
StandardOutput=tty
RemainAfterExit=yes
SysVStartPriority=99

[Install]
WantedBy=multi-user.target

Then make the file chmod +x /etc/rc.local

and add

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

exit 0

Final step is to enable the service

systemctl enable rc-local

December 10, 2018

Your browser sent a request that this server could not understand

Filed under: Linux — Tags: , , , — admin @ 4:51 pm

Well today I am facing another problem.

Got this answer on a apache behind a proxy .

400 Bad Request
Bad Request
Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.

So .. it appear the header that is received by webserver is bigger then normal .

Solution is to increase it .

LimitRequestFieldSize 32760
LimitRequestLine 32760

Please note that is loaded from first VirtualHost.

One solution is to tested with this

curl -v -H “CustomHeader: `printf ‘1%.0s’ {1..n}`” localhost

Where n can be replace with a value of for example 20000

 

April 25, 2018

apparmor=”DENIED” operation=”open” profile=”/usr/sbin/mysqld”

Filed under: Linux — Tags: , , — admin @ 12:07 pm

Today try to move the path of mysql to new one , because on ec2 I was left without space.

Well I have stopped the mysqld copy files modity the my.cnf with new datadir but when try to start .. well didn’t started .. After a little dmesg search see that on ubuntu is apparmor .

Try to make alias into file /etc/mysql/mysql.conf.d/mysqld.cnf  but didn’t resolve the problem

Find out that you have to edit also /etc/apparmor.d/usr.sbin.mysqld

and add

/db/data/mysql r

/db/data/mysql** rwk

After this mysqld started with new path.

December 8, 2017

delete large directory containing thousands of files

Filed under: Linux — Tags: , , , , , — admin @ 11:22 am

Well if you try to remove a directory with multiple files rm will take a long time also some load on that server .

One solution is to rsync a empty directory .

mkdir empty_dir
rsync -a –delete empty_dir/ yourdirectory/

Also a perl can be made but the rsync is easy for me to remeber .

Some more information about this you can find here

https://serverfault.com/questions/183821/rm-on-a-directory-with-millions-of-files/328305#328305

 

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