我想安装 Screenlets，我尝试了以下 bash：
#!/bin/bash
sudo dpkg -l python-wnck >/dev/null 2>&1
if [ $? == 0 ]; then
echo "OK"
else
echo "Install python-wnck"
sudo apt -y install libwnck22
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/g/gnome-python-desktop/python-wnck_2.32.0+dfsg-4_amd64.deb
sudo dpkg -i python-wnck_2.32.0+dfsg-4_amd64.deb
sudo apt --fix-broken -y install
fi
sudo dpkg -l python-gnomekeyring >/dev/null 2>&1
if [ $? == 0 ]; then
echo "OK"
else
echo "Install python-gnomekeyring"
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/g/gnome-python-desktop/python-gnomekeyring_2.32.0+dfsg-4_amd64.deb
sudo dpkg -i python-gnomekeyring_2.32.0+dfsg-4_amd64.deb
sudo apt --fix-broken -y install
fi
sudo add-apt-repository -y ppa:screenlets/ppa
sudo sed -i 's/bionic/xenial/g' /etc/apt/sources.list.d/screenlets-ubuntu-ppa-bionic.list
sudo apt update && sudo apt -y install screenlets screenlets-pack-all
但我得到的只是：
tobi@tobi-System-Product-Name:~$ #!/bin/bash
tobi@tobi-System-Product-Name:~$ sudo dpkg -l python-wnck >/dev/null 2>&1
tobi@tobi-System-Product-Name:~$ if [ $? == 0 ]; then
> echo "OK"
> else
> echo "Install python-wnck"
> sudo apt -y install libwnck22
> wget -c http://archive.ubuntu.com/ubuntu/pool/universe/g/gnome-python-desktop/python-wnck_2.32.0+dfsg-4_amd64.deb
> sudo dpkg -i python-wnck_2.32.0+dfsg-4_amd64.deb
> sudo apt --fix-broken -y install
> fi
OK
tobi@tobi-System-Product-Name:~$ sudo dpkg -l python-gnomekeyring >/dev/null 2>&1
tobi@tobi-System-Product-Name:~$ if [ $? == 0 ]; then
> echo "OK"
> else
> echo "Install python-gnomekeyring"
> wget -c http://archive.ubuntu.com/ubuntu/pool/universe/g/gnome-python-desktop/python-gnomekeyring_2.32.0+dfsg-4_amd64.deb
> sudo dpkg -i python-gnomekeyring_2.32.0+dfsg-4_amd64.deb
> sudo apt --fix-broken -y install
> fi
OK
tobi@tobi-System-Product-Name:~$ sudo add-apt-repository -y ppa:screenlets/ppa
sudo: unable to execute /usr/bin/add-apt-repository: No such file or directory
tobi@tobi-System-Product-Name:~$ sudo sed -i 's/bionic/xenial/g' /etc/apt/sources.list.d/screenlets-ubuntu-ppa-bionic.list
sed: can't read /etc/apt/sources.list.d/screenlets-ubuntu-ppa-bionic.list: No such file or directory
tobi@tobi-System-Product-Name:~$ sudo apt update && sudo apt -y install screenlets screenlets-pack-all
Get:1 http://archive.getdeb.net/ubuntu xenial-getdeb InRelease
Err:1 http://archive.getdeb.net/ubuntu xenial-getdeb InRelease
Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]
Ign:3 http://ppa.launchpad.net/inameiname/stable/ubuntu bionic InRelease
Hit:4 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu bionic InRelease
Hit:5 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Err:6 http://ppa.launchpad.net/inameiname/stable/ubuntu bionic Release
404 Not Found [IP: 91.189.95.83 80]
Get:7 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Hit:8 https://download.sublimetext.com apt/dev/ InRelease
Get:9 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
sh: 1: /usr/lib/cnf-update-db: not found
Reading package lists... Done
E: Failed to fetch http://archive.getdeb.net/ubuntu/dists/xenial-getdeb/InRelease Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: The repository 'http://archive.getdeb.net/ubuntu xenial-getdeb InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/inameiname/stable/ubuntu bionic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Problem executing scripts APT::Update::Post-Invoke-Success 'if /usr/bin/test -w /var/lib/command-not-found/ -a -e /usr/lib/cnf-update-db; then /usr/lib/cnf-update-db > /dev/null; fi'
E: Sub-process returned an error code
tobi@tobi-System-Product-Name:~$
我认为 sudo apt-get update 对我不起作用，但我不知道如何解决这个问题。
输出apt-cache policy python3-software-properties：
python3-software-properties:
Installed: 0.96.24.32.4
Candidate: 0.96.24.32.4
Version table:
*** 0.96.24.32.4 100
100 /var/lib/dpkg/status
0.96.20.7 500
500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages
0.96.20 500
500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
500 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages