python3-pip安装好了，但找不到pip3命令？

我正在几台电脑上测试一个Python3程序。为此，我需要用pip3安装一个Python的库。

于是，我首先在每台电脑上安装python3-pip（大家都是运行Kubuntu操作系统）。一切正常，然后我用pip3安装了我所需要的包，除了一台电脑，我都成功的安装了。

在那台电脑上，python3-pip显然是成功的安装了，但是当我查找包的时候，我得到了这样的错误（翻译是自制的）：

Command «pip3» was not found, maybe you wanted to say:
 The command «pip» from the package «python-pip» (universe)
pip3: command not found

EDIT*

dpkg -L python3-pip的结果：

/.
/usr
/usr/share
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/pip-3.2.1.gz
/usr/share/doc
/usr/share/doc/python3-pip
/usr/share/doc/python3-pip/changelog.Debian.gz
/usr/share/doc/python3-pip/copyright
/usr/bin
/usr/bin/pip-3.2
/usr/lib
/usr/lib/python3
/usr/lib/python3/dist-packages
/usr/lib/python3/dist-packages/pip
/usr/lib/python3/dist-packages/pip/log.py
/usr/lib/python3/dist-packages/pip/commands
/usr/lib/python3/dist-packages/pip/commands/unzip.py
/usr/lib/python3/dist-packages/pip/commands/zip.py
/usr/lib/python3/dist-packages/pip/commands/install.py
/usr/lib/python3/dist-packages/pip/commands/completion.py
/usr/lib/python3/dist-packages/pip/commands/uninstall.py
/usr/lib/python3/dist-packages/pip/commands/search.py
/usr/lib/python3/dist-packages/pip/commands/freeze.py
/usr/lib/python3/dist-packages/pip/commands/ __init__.py
/usr/lib/python3/dist-packages/pip/commands/help.py
/usr/lib/python3/dist-packages/pip/commands/bundle.py
/usr/lib/python3/dist-packages/pip/_pkgutil.py
/usr/lib/python3/dist-packages/pip/util.py
/usr/lib/python3/dist-packages/pip/status_codes.py
/usr/lib/python3/dist-packages/pip/vcs
/usr/lib/python3/dist-packages/pip/vcs/ __init__.py
/usr/lib/python3/dist-packages/pip/vcs/mercurial.py
/usr/lib/python3/dist-packages/pip/vcs/git.py
/usr/lib/python3/dist-packages/pip/vcs/bazaar.py
/usr/lib/python3/dist-packages/pip/vcs/subversion.py
/usr/lib/python3/dist-packages/pip/baseparser.py
/usr/lib/python3/dist-packages/pip/exceptions.py
/usr/lib/python3/dist-packages/pip/index.py
/usr/lib/python3/dist-packages/pip/basecommand.py
/usr/lib/python3/dist-packages/pip/req.py
/usr/lib/python3/dist-packages/pip/locations.py
/usr/lib/python3/dist-packages/pip/ __init__.py
/usr/lib/python3/dist-packages/pip/runner.py
/usr/lib/python3/dist-packages/pip/backwardcompat.py
/usr/lib/python3/dist-packages/pip/download.py
/usr/lib/python3/dist-packages/pip-1.1.egg-info
/usr/lib/python3/dist-packages/pip-1.1.egg-info/SOURCES.txt
/usr/lib/python3/dist-packages/pip-1.1.egg-info/not-zip-safe
/usr/lib/python3/dist-packages/pip-1.1.egg-info/top_level.txt
/usr/lib/python3/dist-packages/pip-1.1.egg-info/PKG-INFO
/usr/lib/python3/dist-packages/pip-1.1.egg-info/entry_points.txt
/usr/lib/python3/dist-packages/pip-1.1.egg-info/dependency_links.txt