Category: Linux

CHMOD recursively on directories and files

Directories:

find /path/to/directory -type d -exec chmod 755 {} +

Files

find /path/to/directory -type f -exec chmod 644 {} +

March 12, 2025

Laravel view edits triggering file_put_contents() permission denied fix

php artisan cache:clear 
composer dump-autoload
sudo chmod -R 775 storage/
sudo chgrp -R www-data storage bootstrap/cache
sudo chmod -R ug+rwx storage bootstrap/cache

More here and here

October 20, 2024

SSH login using key flag

ssh -p 22 -i ~/.ssh/<name_of_key> <username>@<host>

August 30, 2024

Install MySQL on Ubuntu 20.04

Check out this article: https://www.digitalocean.com/community/tutorials/how-to-install-mysql-on-ubuntu-20-04

June 25, 2024
“SSH Too Many Authentication Failures” Error
To fix this error, you need to add the IdentitiesOnly with a value of yes, which instructs ssh to only use the authentication identity files specified on the command line or the configured in the ssh_config file(s), even if ssh-agent offers additional identities.

For example:
```
$ ssh -o IdentitiesOnly=yes vps2
```
More info in this article

On a side note, if FileZilla shoots an error at connecting, run the following command from the terminal:
```
$ SSH_AUTH_SOCK=null filezilla &
```
November 14, 2023
Error: ENOSPC: System limit for number of file watchers reached
The meaning of this error is that the number of files monitored by the system has reached the limit!!

Result: The command executed failed! Or throw a warning (such as executing a react-native start VSCode)

Solution:

Modify the number of system monitoring files

Ubuntu
```
sudo gedit /etc/sysctl.conf
```
Add a line at the bottom
```
fs.inotify.max_user_watches=524288
```
Then save and exit!
```
sudo sysctl -p
```
to check it

Then it is solved!

Credit: https://stackoverflow.com/questions/55763428/react-native-error-enospc-system-limit-for-number-of-file-watchers-reached
May 23, 2023
Install multiple PHP versions on Linux Mint

https://help.clouding.io/hc/en-us/articles/360021630059-How-to-Install-Multiple-PHP-Versions-7-2-7-4-8-0-and-8-1-on-Ubuntu-20-04

March 26, 2023