几天前，我将 Ubuntu 从 19.10 升级到了 20.04。升级后，除了 Zeal 文档浏览器之外，其他一切都运行正常。我明确地说要更新qt5。但我不知道如何更新它。错误信息是可执行文件“zeal”需要 Qt 5.12.5，发现 Qt 5.12.4。
编辑
我从软件中心安装了 zeal
命令输出
parikshit@Vostro-5568:~$ which zeal
/usr/bin/zeal
parikshit@Vostro-5568:~$ dpkg -l | grep zeal
ii zeal 1:0.6.1-1build1 amd64 Simple offline API documentation browser
parikshit@Vostro-5568:~$ apt-cache policy zeal
zeal:
Installed: 1:0.6.1-1build1
Candidate: 1:0.6.1-1build1
Version table:
*** 1:0.6.1-1build1 500
500 http://in.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
100 /var/lib/dpkg/status
parikshit@Vostro-5568:~$ ldd /usr/bin/zeal | grep local
parikshit@Vostro-5568:~$
输出ldd /usr/bin/zeal
parikshit@Vostro-5568:~$ ldd /usr/bin/zeal
linux-vdso.so.1 (0x00007fff84385000)
libQt5Widgets.so.5 => /lib/x86_64-linux-gnu/libQt5Widgets.so.5 (0x00007fbfd6a54000)
libQt5Core.so.5 => /lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007fbfd650d000)
libsqlite3.so.0 => /lib/x86_64-linux-gnu/libsqlite3.so.0 (0x00007fbfd63e4000)
libQt5Concurrent.so.5 => /lib/x86_64-linux-gnu/libQt5Concurrent.so.5 (0x00007fbfd63db000)
libQt5Gui.so.5 => /lib/x86_64-linux-gnu/libQt5Gui.so.5 (0x00007fbfd5df5000)
libQt5Network.so.5 => /lib/x86_64-linux-gnu/libQt5Network.so.5 (0x00007fbfd5c34000)
libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007fbfd5af5000)
libQt5X11Extras.so.5 => /lib/x86_64-linux-gnu/libQt5X11Extras.so.5 (0x00007fbfd5aee000)
libxcb-keysyms.so.1 => /lib/x86_64-linux-gnu/libxcb-keysyms.so.1 (0x00007fbfd5ae9000)
libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007fbfd5abf000)
libQt5WebKitWidgets.so.5 => /lib/x86_64-linux-gnu/libQt5WebKitWidgets.so.5 (0x00007fbfd5a72000)
libQt5WebKit.so.5 => /lib/x86_64-linux-gnu/libQt5WebKit.so.5 (0x00007fbfd2c72000)
libarchive.so.13 => /lib/x86_64-linux-gnu/libarchive.so.13 (0x00007fbfd2bae000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fbfd29cd000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fbfd29b2000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fbfd27c0000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fbfd279d000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fbfd264e000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fbfd2630000)
libicui18n.so.63 => /lib/x86_64-linux-gnu/libicui18n.so.63 (0x00007fbfd234e000)
libicuuc.so.63 => /lib/x86_64-linux-gnu/libicuuc.so.63 (0x00007fbfd217a000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fbfd2174000)
libpcre2-16.so.0 => /lib/x86_64-linux-gnu/libpcre2-16.so.0 (0x00007fbfd20f1000)
libdouble-conversion.so.3 => /lib/x86_64-linux-gnu/libdouble-conversion.so.3 (0x00007fbfd20db000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007fbfd1fb1000)
/lib64/ld-linux-x86-64.so.2 (0x00007fbfd7213000)
libGL.so.1 => /lib/x86_64-linux-gnu/libGL.so.1 (0x00007fbfd1f29000)
libpng16.so.16 => /lib/x86_64-linux-gnu/libpng16.so.16 (0x00007fbfd1ef1000)
libharfbuzz.so.0 => /lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007fbfd1dec000)
libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007fbfd1de6000)
libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007fbfd1ddc000)
libQt5PrintSupport.so.5 => /lib/x86_64-linux-gnu/libQt5PrintSupport.so.5 (0x00007fbfd1d63000)
libQt5Quick.so.5 => /lib/x86_64-linux-gnu/libQt5Quick.so.5 (0x00007fbfd18a4000)
libQt5WebChannel.so.5 => /lib/x86_64-linux-gnu/libQt5WebChannel.so.5 (0x00007fbfd1883000)
libQt5Positioning.so.5 => /lib/x86_64-linux-gnu/libQt5Positioning.so.5 (0x00007fbfd17f5000)
libQt5Sensors.so.5 => /lib/x86_64-linux-gnu/libQt5Sensors.so.5 (0x00007fbfd17b3000)
libwoff2dec.so.1.0.2 => /lib/x86_64-linux-gnu/libwoff2dec.so.1.0.2 (0x00007fbfd17a4000)
libjpeg.so.8 => /lib/x86_64-linux-gnu/libjpeg.so.8 (0x00007fbfd171f000)
libwebp.so.6 => /lib/x86_64-linux-gnu/libwebp.so.6 (0x00007fbfd14b6000)
libhyphen.so.0 => /lib/x86_64-linux-gnu/libhyphen.so.0 (0x00007fbfd14af000)
libxml2.so.2 => /lib/x86_64-linux-gnu/libxml2.so.2 (0x00007fbfd12f5000)
libxslt.so.1 => /lib/x86_64-linux-gnu/libxslt.so.1 (0x00007fbfd12b3000)
libgio-2.0.so.0 => /lib/x86_64-linux-gnu/libgio-2.0.so.0 (0x00007fbfd10d6000)
libgstapp-1.0.so.0 => /lib/x86_64-linux-gnu/libgstapp-1.0.so.0 (0x00007fbfd10c4000)
libgstbase-1.0.so.0 => /lib/x86_64-linux-gnu/libgstbase-1.0.so.0 (0x00007fbfd1046000)
libgstreamer-1.0.so.0 => /lib/x86_64-linux-gnu/libgstreamer-1.0.so.0 (0x00007fbfd0eff000)
libgstpbutils-1.0.so.0 => /lib/x86_64-linux-gnu/libgstpbutils-1.0.so.0 (0x00007fbfd0ec1000)
libgstaudio-1.0.so.0 => /lib/x86_64-linux-gnu/libgstaudio-1.0.so.0 (0x00007fbfd0e44000)
libgsttag-1.0.so.0 => /lib/x86_64-linux-gnu/libgsttag-1.0.so.0 (0x00007fbfd0e04000)
libgstvideo-1.0.so.0 => /lib/x86_64-linux-gnu/libgstvideo-1.0.so.0 (0x00007fbfd0d53000)
libgstfft-1.0.so.0 => /lib/x86_64-linux-gnu/libgstfft-1.0.so.0 (0x00007fbfd0d46000)
libgobject-2.0.so.0 => /lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007fbfd0ce9000)
libQt5Qml.so.5 => /lib/x86_64-linux-gnu/libQt5Qml.so.5 (0x00007fbfd0833000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fbfd0828000)
libnettle.so.7 => /lib/x86_64-linux-gnu/libnettle.so.7 (0x00007fbfd07ec000)
libacl.so.1 => /lib/x86_64-linux-gnu/libacl.so.1 (0x00007fbfd07e1000)
liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007fbfd07ba000)
libzstd.so.1 => /lib/x86_64-linux-gnu/libzstd.so.1 (0x00007fbfd0711000)
liblz4.so.1 => /lib/x86_64-linux-gnu/liblz4.so.1 (0x00007fbfd06f0000)
libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (0x00007fbfd06db000)
libicudata.so.63 => /lib/x86_64-linux-gnu/libicudata.so.63 (0x00007fbfcecea000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007fbfcec77000)
libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007fbfcebbf000)
libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007fbfceb8b000)
libfreetype.so.6 => /lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007fbfceaca000)
libgraphite2.so.3 => /lib/x86_64-linux-gnu/libgraphite2.so.3 (0x00007fbfcea9d000)
libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007fbfcea83000)
libwoff2common.so.1.0.2 => /lib/x86_64-linux-gnu/libwoff2common.so.1.0.2 (0x00007fbfcea7e000)
libbrotlidec.so.1 => /lib/x86_64-linux-gnu/libbrotlidec.so.1 (0x00007fbfcea6f000)
libicuuc.so.66 => /lib/x86_64-linux-gnu/libicuuc.so.66 (0x00007fbfce887000)
libgmodule-2.0.so.0 => /lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007fbfce881000)
libmount.so.1 => /lib/x86_64-linux-gnu/libmount.so.1 (0x00007fbfce821000)
libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007fbfce7f6000)
libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007fbfce7da000)
liborc-0.4.so.0 => /lib/x86_64-linux-gnu/liborc-0.4.so.0 (0x00007fbfce755000)
libffi.so.6 => /lib/x86_64-linux-gnu/libffi.so.6 (0x00007fbfce74b000)
libbrotlicommon.so.1 => /lib/x86_64-linux-gnu/libbrotlicommon.so.1 (0x00007fbfce728000)
libicudata.so.66 => /lib/x86_64-linux-gnu/libicudata.so.66 (0x00007fbfccc67000)
libblkid.so.1 => /lib/x86_64-linux-gnu/libblkid.so.1 (0x00007fbfccc0e000)
libpcre2-8.so.0 => /lib/x86_64-linux-gnu/libpcre2-8.so.0 (0x00007fbfccb7e000)
parikshit@Vostro-5568:~$
答案1
您的一些软件包仍然过时 - libffi7，libicu63。请检查 的错误输出sudo apt-get update，检查您的存储库（应该有所有的 pockets -主要的，宇宙，多元宇宙，受限制的) 和所有更新频道 (焦点更新，焦点保护）。然后运行sudo apt-get dist-upgrade以获取所有最新的依赖项（如果有，请保存错误日志）。
然后使用zealdeb-package存储库：
sudo add-apt-repository universe
sudo apt-get install zeal