# [Debian] add-apt-repository command not found 問題
add-apt-repository 是用來更新 apt-get 套件來源的指令。
在比較新的 Ubuntu 或是 Debian 版本，這可能不是在初始預設便有的指令集中。
我們可以使用以下指令來安裝這個指令套件。
$ sudo apt-get install software-properties-common
eading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
gir1.2-glib-2.0 gir1.2-packagekitglib-1.0 iso-codes libappstream4 libcurl3-gnutls libgirepository-1.0-1 libglib2.0-bin libglib2.0-data libgstreamer1.0-0 libpackagekit-glib2-18
libpolkit-agent-1-0 libpolkit-backend-1-0 libpolkit-gobject-1-0 libstemmer0d libyaml-0-2 packagekit packagekit-tools policykit-1 python3-gi python3-pycurl python3-software-properties
Suggested packages:
isoquery gstreamer1.0-tools appstream libcurl4-gnutls-dev python-pycurl-doc python3-pycurl-dbg
The following NEW packages will be installed:
gir1.2-glib-2.0 gir1.2-packagekitglib-1.0 iso-codes libappstream4 libcurl3-gnutls libgirepository-1.0-1 libglib2.0-bin libglib2.0-data libgstreamer1.0-0 libpackagekit-glib2-18
libpolkit-agent-1-0 libpolkit-backend-1-0 libpolkit-gobject-1-0 libstemmer0d libyaml-0-2 packagekit packagekit-tools policykit-1 python3-gi python3-pycurl python3-software-properties
software-properties-common
0 upgraded, 22 newly installed, 0 to remove and 5 not upgraded.
Need to get 8194 kB of archives.
如此就可以解決此問題了。
