How to disable MySQL from autostart when Ubuntu bootup
Answer:
A newer version of MySQL use upstart to autostart when system bootup, to disable it
# sudo mkdir /etc/init.disabled # sudo mv /etc/init/mysql.conf /etc/init.disabled/
May 182013
Nov 172012
Upgrade a single package in Ubuntu
Answer:
To upgrade a single package, first need to perform an update first.
# sudo apt-get update
Then use the install sub command to perform an upgrade, e.g. apache2
#sudo apt-get install apache2
Jan 202012
Removed opened port in ufw
Answer:
If you have opened a port using the ufw command in Ubuntu, but now you want to delete it, you can..
# sudo ufw delete allow 8080/tcp
And then do a reload
# # sudo ufw reload
That's all.
Jan 172012
How to perform a reverse DNS lookup in Linux
Answer:
To perform a reverse DNS lookup for a domain in Linux, you can use the dig command, e.g.
# dig -x 8.8.8.8
; <<>> DiG 9.7.0-P1 <<>> -x 8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59808
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;8.8.8.8.in-addr.arpa. IN PTR
;; ANSWER SECTION:
8.8.8.8.in-addr.arpa. 86328 IN PTR google-public-dns-a.google.com.
..
Dec 042011
Erase old downloaded packages from apt-get's cache
Answer:
The erase old downloaded packages from apt-get's cache, which are stored under the location: /var/cache/apt/archives
Try:
# sudo apt-get autoclean
