Git - Update .gitignore

git rm -r --cached . git add . git commit -m "fixed untracked files"

Flutter app- Generate SHA-1

keytool -list -v -keystore "/home/USER/.android/debug.keystore" -alias androiddebugkey -storepass android -keypass android

Ubuntu - Exlcluir paquetes de actualización

Ejemplo: Para excluir el paquete mysql-server-5.7 APT sudo apt-mark hold mysql-server-5.7 DPKG echo "package_name mysql-server-5.7" | sudo dpkg --set-selections APTITUDE sudo aptitude hold mysql-server-5.7

MySQL- Buscar y Borrar Foreign Key

SHOW CREATE TABLE usuarios; ALTER TABLE usuarios DROP FOREIGN KEY FKp4gp05h4hauh0ahb1r4n2yjg4;

MySQL- Access denied for user in command-line

GRANT ALL on *.* to 'username'@'localhost' identified by 'password';

Iterar Map / Iterate Map

for (Map.Entry entry : camposDocumento.entrySet()) {
 String key = entry.getKey();
 String valor = entry.getValue();
}

MySQL- You are using safe update mode and you tried to update a table without a WHERE clause that uses a KEY column

SET SQL_SAFE_UPDATES=0; update tabla set columna = null; SET SQL_SAFE_UPDATES=1;