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Lost connection to MySQL server at 'reading initial communication packet', system error: 0
...
1) Allow remote connect to MySQL.
Edit file:
>sudo nano /etc/mysql/my.cnf
Comment line:
#bind-address = 127.0.0.1
Restart MySQL:
>sudo service mysql restart
2) Create user for remote connection.
>mysql -uroot -p
CREATE USER 'developer'@'localhost' IDENTIFIED B...
Hibernate: hbm2ddl.auto=update in production?
...ployments, namely the ones he is familiar with (his company, his industry, etc).
The universe of "production deployments" is vast and varied.
An experienced Hibernate developer knows exactly what DDL is going to result from a given mapping configuration. As long as you test and validate that what...
List of tables, db schema, dump etc using the Python sqlite3 API
...
You can fetch the list of tables and schemata by querying the SQLITE_MASTER table:
sqlite> .tab
job snmptarget t1 t2 t3
sqlite> select name from sqlite_master where type = 'table';
job
t1
t2
s...
Access Denied for User 'root'@'localhost' (using password: YES) - No Privileges?
...
Try the following commands
~$ sudo /etc/init.d/mysql stop
~$ sudo mysqld_safe --skip-grant-tables &
~$ mysql -u root
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1 to server version: 4.1.15-Debian_1-log
Type 'help;...
When to throw an exception?
...es not expect. UserNameNotValidException , PasswordNotCorrectException etc.
32 Answers
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How to write multiple line string using Bash with variables?
...ng.
Correct would be:
#!/bin/bash
kernel="2.6.39"
distro="xyz"
cat >/etc/myconfig.conf <<EOL
line 1, ${kernel}
line 2,
line 3, ${distro}
line 4 line
...
EOL
cat /etc/myconfig.conf
This construction is referred to as a Here Document and can be found in the Bash man pages under man --...
How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
...is the solution for Ubuntu users
First we have to stop postgresql
sudo /etc/init.d/postgresql stop
Create a new file called /etc/apt/sources.list.d/pgdg.list and add below line
deb http://apt.postgresql.org/pub/repos/apt/ utopic-pgdg main
Follow below commands
wget -q -O - https://www.postg...
How can I stop redis-server?
...if you are on ubuntu you can try to restart redis server through init.d:
/etc/init.d/redis-server restart
or stop/start it:
/etc/init.d/redis-server stop
/etc/init.d/redis-server start
On Mac
redis-cli shutdown
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How can mixed data types (int, float, char, etc) be stored in an array?
... it has many names (kind of like dictionaries, hashes, associative arrays, etc.).
– Barmar
Sep 2 '13 at 17:40
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Locate Git installation folder on Mac OS X
...ormation to place /usr/local/git/bin before /usr/bin in the $PATH or edit /etc/paths and insert /usr/local/git/bin as the first entry (see this answer).
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