login to mysql as root with password
list users
mysql -u root -p
list users
SELECT User FROM mysql.user;
Code Snippets and Programming Tasks that I need in my usual Work
mysql -u root -p
SELECT User FROM mysql.user;
nohup osm2pgsql --slim -d gis -C 16000 --hstore -S openstreetmap-carto-2.45.1/openstreetmap-carto.style planet-latest.osm.pbf > /dev/null 2>&1&
nohup osm2pgsql --slim -d gis -C 16000 --hstore --flat-nodes ~/flat_nodes/flatnodes -S openstreetmap-carto-2.45.1/openstreetmap-carto.style planet-latest.osm.pbf > /dev/null 2>&1&
sudo apt-get update sudo apt-get install iptables-persistent
iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPTAccept all packets destined to port 22 or 80
iptables -A INPUT -p tcp --dport 22 -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j ACCEPT
sudo iptables -I INPUT 1 -i lo -j ACCEPT
iptables -A INPUT -p tcp --dport 3306 -s 192.168.0.0/24 -j ACCEPT
iptables -A INPUT -j DROP
iptables -A INPUT -j REJECT
sudo service netfilter-persistent save
sudo iptables -I INPUT 1 -i lo -j ACCEPT
sudo iptables -L --line-numbers
sudo iptables -I INPUT 4 new_rule_here
sudo iptables -D INPUT 3
sudo iptables-save > iptables-export
sudo iptables -A INPUT -p tcp --match multiport --dports 1024:3000 -j ACCEPT
sudo iptables-restore < iptables-export
iptables -I INPUT -p udp --dport 111 -j REJECT
iptables -A INPUT -i ens19 -s 192.168.100.0/24 -j ACCEPT
sudo iptables -I INPUT 1 -i lo -j ACCEPT sudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT sudo iptables -A INPUT -p tcp --dport 80 -j ACCEPT sudo iptables -A INPUT -p tcp --dport 443 -j ACCEPT sudo iptables -A INPUT -i ens19 -s 192.168.100.0/24 -j ACCEPT sudo iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT sudo iptables -A INPUT -j REJECT
mkfs.ext4 /dev/sdb1
mount /dev/sdb1 /newstorage
/etc/fstab
/dev/sdb1 /newstorage ext4 defaults 0 10
mount /newstorage
OR
mount -t ext4 /dev/sda1 /newstorage
sudo cp mysql-connector-java-5.1.38-bin.jar $CATALINA_HOME/lib
sudo apt-get install default-jre
Then start traccar.<entry key='database.user'>root</entry> <entry key='database.password'> </entry>to solve it: remove the space in this field and start traccar service again.
<entry key='database.user'>root</entry> <entry key='database.password'></entry>