Ubuntu 下如何查看已安装的软件?

1.查看安装的所有软件

dpkg -l

例如:dpkg -l | grep ftp

<span >:~$ dpkg -l | grep ftp
ii  ftp                                                   0.17-28                                             i386         classical file transfer client
</span>

2.查看软件安装的路径

dpkg -L | grep ftp

<span >:~$ dpkg -L ftp
/.
/usr
/usr/bin
/usr/bin/netkit-ftp
/usr/share
/usr/share/doc
/usr/share/doc/ftp
/usr/share/doc/ftp/BUGS
/usr/share/doc/ftp/copyright
/usr/share/doc/ftp/README.Debian
/usr/share/doc/ftp/changelog.Debian.gz
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/netkit-ftp.1.gz
/usr/share/man/man5
/usr/share/man/man5/netrc.5.gz
/usr/bin/pftp
/usr/share/man/man1/pftp.1.gz
</span>

  

也可以用 whereis ftp

3.查看软件版本

aptitude show

例如:aptitude show ftp