touch /forcefsck simply creates a file /forcefsck. This file will cause the system to run fsck on the next reboot before the filesystem is mounted. Its similar to when you try to run chkdsk in Windows and it says it can't but it will do it on the next reboot.

askubuntu

Complete article about this - how-to-force-fsck-filesystem

Built-in git GUI

• gitk

Use colorful git output

• git config color.ui true

Show log on just one line per commit

• git config format.pretty oneline

Use interactive adding

• git add -i

SOLUTION:

• GO TO: Start Menu -> Startup Applications
• Click on + (Soft Button denoted by “PLUS/ADDITION/+” sign/symbol at the bottom of the “Startup Applications” window).
• Click on "Custom command."
• Add any name/description you like, ex "DISABLE BLUETOOTH"
• Add Command as: rfkill block bluetooth

Article

digitalocean

Step One - Perform a MySQL Dump

mysqldump -u root -p --opt [database name] > [database name].sql

Step Two - Copy the Database

scp [database name].sql [username]@[servername]:path/to/database/

Step Three - Import the Database

mysql -u root -p newdatabase < /path/to/newdatabase.sql

mysqldump & gzip, The Best Combo

Backup:

mysqldump -u username -p your_db_name | gzip -9 > your_db_name.sql.gz

Restore:

zcat your_db_name.sql.gz | mysql -u username -p your_db_name

askubuntu

TL;DR

Use the --remove flag, similar to how the PPA was added:

sudo add-apt-repository --remove ppa:whatever/ppa

...

You can also remove PPAs by deleting the .list files from /etc/apt/sources.list.d directory.

Last but not least, you can also disable or remove PPAs from the "Software Sources" section in Ubuntu Settings with a few clicks of your mouse (no terminal needed).