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It has a "janitor" option where you can clear caches files, delete old kernels, delete orphaned .debs and more like that. But what gets removed tends to be a few MBs of software that is not longer used on your system but will not have interfered with what you normally do.

First of all: never use cleaning applications like BleachBit! Those software wrecking balls are very risky and may damage your system beyond repair. There are a few safe cleaning actions, which I'll describe below.

このリンクに 色々書いてありますが、ひとつのアプリケーションで、一気にやってしまいたいのですが
我希望、使用「単一的应用程序」

#!/bin/bash
#
sudo echo "sudo apt-get -y autoremove"
sudo apt-get -y autoremove
# 
sudo echo "sudo apt-get -y autoclean"
sudo apt-get -y autoclean
# 
sudo echo "sudo apt-get -y clean"
sudo apt-get -y clean
# 
sudo echo "sudo apt-get -y check"
sudo apt-get -y check
# 
# sudo echo "sudo apt-get -f -y install"
# sudo apt-get -f -y install
# 
sudo echo "sudo dpkg --configure -a"
sudo dpkg --configure -a
# 
sudo echo "sudo apt-get -y update"
sudo apt-get -y update
# 
sudo echo "sudo apt-get -y upgrade"
sudo apt-get -y upgrade
# 
sudo echo "sudo apt-get -y dist-upgrade"
sudo apt-get -y dist-upgrade
# 
sudo echo "#..........................................."
sudo echo "#.......................Finish.............."

2. create a new script file

gksudo gedit

gksudo gedit

In Linux (and Unix in general), there is a SuperUser named root.

3. Look the following pages if you want to know the meaning of above commands :
3-1. http://manpages.ubuntu.com/manpages/yak ... get.8.html

#!/bin/bash

Bleachbit only if you become advanced and your system become so complicated.

2. gedit is a graphic text editor

3. login with username root only if you become advanced in the future.
3-1. User Root is the default user since you boot Ubuntu till login
with non-root username.
3-2. Login with non-root username would be encouraged for new user.

gksudo pluma ~/myMaintaining