Segmentation faulty tree

So i just came across this problem: as i was working with a Raspberry pi, i got the following message: “Segmentation faulty tree” as i was trying to install a few packages on my raspbian jessie.

Luckily, it was a quick fix:

sudo rm /var/cache/apt/*.bin
apt update && apt upgrade


Google Cloud Platform – FTP

So if you’re getting an error similar to this: “500 I won’t open a connection to 10.142.0.9 (only to…” if you’re trying to use FTP on a VM on Google Cloud, fear not, it’s an easy fix.

You can do this 2 ways:

1 – FTP -p remote-host

or

2 – FTP remote-host -> log in -> then type “passive” without quotes, and everything should be just fine.

Enjoy!

MySQL 5.7 – reset root password

So there’s been a change in the way you reset the MySQL root password in MySQL 5.7 as in the “password” field got removed, so the old way of resetting the password doesn’t work anymore:

| authentication_string | text | YES | | NULL | |

So let’s go:

1 – stop the mysqld:

systemctl mysqld stop

2 – start mysqld with skip-grant so it doesn’t ask for your password:

mysqld –skip-grant-tables &

3 – change the pw:

use mysql;

update user set authentication_string=password(‘yourNewPwHere’) where user=’root’;

flush privileges;

quit

4 – stop the mysql

5 – start the mysql with the new root pw

systemctl start mysqld

Enjoy!

Reset wordpress file/folder permissions

If you need a quick and easy fix for broken wordpress permissions - feel free to copy/paste the lines below. These will reset them to defaults.

cd /your/wordpress/folder
find . -type d -exec chmod 755 {} \;  # Change directory permissions rwxr-xr-x
find . -type f -exec chmod 644 {} \;  # Change file permissions rw-r--r--

write:errno=104 / New, (NONE), Cipher is (NONE)

So if you’re having some issues with SSL connections, it’s higly likely you’re experiencing them from client version openssl 1.0.2. the fix is below and i can confirm it works on both openssl 1.0.1 and 1.0.2.

openssl s_client -connect yourdomain.com:5671 -showcerts
CONNECTED(00000003)
write:errno=104

no peer certificate available

No client certificate CA names sent

SSL handshake has read 0 bytes and written 305 bytes

New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : 0000
Session-ID:
Session-ID-ctx:
Master-Key:
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1484575655
Timeout : 300 (sec)
Verify return code: 0 (ok)

openssl s_client \

-cipher RSA \

-connect mydomain.com:5671 \

-servername mydomain.com \

-cert client/cert.pem \

-key client/key.pem \

-CAfile testca/cacert.pem \

-tls1_2

Enjoy!

vBulletin – can’t login to admincp

So i had the weirdest issue today:

Last night, i installed vbulletin as i want to get a forum going for our new project: Dive: Frozen in time – a puzzle-driven skydiving game in Virtual Reality, made by our brand new studio: spinningBOX VR Studios and everything was fine. Went to bed and when i try to login – i can login to the website but not to the admincp. I was pretty amazed, however one really easy fix was this:

change your cookie prefix in core/includes/config.php to rewrite the cookie key.

$config['Misc']['cookieprefix'] = 'bb';
to 
$config['Misc']['cookieprefix'] = 'bb1';

Problem solved.
Enjoy!

npm ERR! EPROTO: protocol error, symlink ‘../rimraf/bin.js’

So i was trying to spin up a docker app in a node.js docker container but i got the error below:

npm ERR! Linux 4.4.24-boot2docker
npm ERR! argv “/usr/local/bin/node” “/usr/local/bin/npm” “install”
npm ERR! node v6.9.1
npm ERR! npm v3.10.8
npm ERR! path ../rimraf/bin.js
npm ERR! code EPROTO
npm ERR! errno -71
npm ERR! syscall symlink

npm ERR! EPROTO: protocol error, symlink ‘../rimraf/bin.js’ -> ‘/root/src/node_modules/.bin/rimraf’
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR! <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm ERR! /root/src/npm-debug.log

Quite a cool fix was:

[email protected]:~/src# npm install –no-bin-links

Ended up working just fine. Enjoy!

npm info lifecycle [email protected]~install: [email protected]
npm info lifecycle pizza[email protected]~postinstall: [email protected]
npm info lifecycle [email protected]~prepublish: [email protected]
[email protected] /root/src
`– [email protected]
`– [email protected]
`– [email protected]
`– [email protected]
+– [email protected]
+– [email protected]
`– [email protected]
`– [email protected]
+– [email protected]
`– [email protected]

npm info ok
[email protected]:~/src#

Git cheat sheet

Some of the stuff that i use more frequently and i still haven’t learned by heart yet, I will be putting them here, in this beautiful cheat sheet.

List all tracked files:

git ls-tree --full-tree -r --name-only HEAD

Untrack file in git:

echo "FILE_NAME" >> .gitignore
git rm --cached FILE_NAME
git add -u
git commit -m "removing file from source control"
git pull origin master
git push origin master

(replace master with the branch you're on)

How to install Node.js on Ubuntu/CentOS

If you want to easy install Node.js on Ubuntu or RHEL – based systems such as CentOS, I’m just gonna point you towards Nodesource. It’s the easiest thing to do since sliced bread.

However, if you’re into more heavy development and you would like an RVM-like setup, you can try NVM. You will be able to run multiple Node.js versions side by side and more granular control.

Enjoy!

Ubuntu 16.04 – Downgrade php from 7.0 to 5.6

So I got a new Ubuntu box and they are loading PHP 7.0 by default, which kinda breaks some apps right now. Lucky for us, I got an answer from a handy guy on AskUbuntu:

Remove the installed PHP packages (if you installed them):

sudo apt purge dpkg -l | grep php| awk '{print $2}' |tr "\n" " "

Add the PPA
sudo add-apt-repository ppa:ondrej/php

Install your PHP Version
sudo apt-get update
sudo apt-get install php5.6

Enjoy!