Ubuntu
當手冊頁不可用時，請參閱“man 7 undocumented”獲取幫助 - WSL 核心 Ubuntu 18.04 安裝
我在帶有lxrunoffline分發管理實用程序的 win10 上使用 WSL。我的發行版是 Ubuntu 18.04 核心安裝，可以在這裡找到 -下載連結。
鍵入
man man,man pwd或man <anything>產生以下結果：No manual entry for man See 'man 7 undocumented' for help when manual pages are not available.這是我嘗試過的一些命令：
$ sudo mandb Purging old database entries in /usr/share/man... Processing manual pages under /usr/share/man... Purging old database entries in /usr/share/man/cs... Processing manual pages under /usr/share/man/cs... Purging old database entries in /usr/share/man/da... Processing manual pages under /usr/share/man/da... ... 0 man subdirectories contained newer manual pages. 0 manual pages were added. 0 stray cats were added. 0 old database entries were purged. $ sudo mandb -t */ output here certainly looks suspicious /* mandb: warning: /usr/share/man/man1/sh.1.gz is a dangling symlink mandb: warning: can't update index cache /var/cache/man/index.db: Resource temporarily unavailable mandb: warning: can't update index cache /var/cache/man/cs/index.db: Resource temporarily unavailable mandb: warning: can't update index cache /var/cache/man/da/index.db: Resource temporarily unavailable mandb: warning: can't update index cache /var/cache/man/de/index.db: Resource temporarily unavailable ... $ dpkg -l | grep -i manpages ii manpages 4.15-1 all Manual pages about using a GNU/Linux system ii manpages-dev 4.15-1 all Manual pages about using GNU/Linux for development ii manpages-posix 2013a-2 all Manual pages about using POSIX system我還檢查了
/usr/share/man文件夾，它們大多是空的（其他 manpath 文件夾完全是空的），除了一些損壞的符號連結：$ manpath /usr/local/man:/usr/local/share/man:/usr/share/man $ cd /usr/share/man/man1 $ ls -alh drwxr-xr-x 1 root root 4.0K Nov 27 18:16 . drwxr-xr-x 1 root root 4.0K Sep 28 04:02 .. lrwxrwxrwx 1 root root 9 Sep 28 04:00 sh.1.gz -> dash.1.gz $ file sh.1.gz sh.1.gz: broken symbolic link to dash.1.gz然後我嘗試將我在Ubuntu 手冊頁網站上找到的 man gzips放入 man1 文件夾中，使其正常工作：
$ cd /usr/share/man/man1 $ ls -alh drwxr-xr-x 1 root root 4.0K Nov 27 18:16 . drwxr-xr-x 1 root root 4.0K Sep 28 04:02 .. -rwxr-xr-x 1 root root 3.1K Nov 27 18:16 ls.1.gz <-- downloaded this one lrwxrwxrwx 1 root root 9 Sep 28 04:00 sh.1.gz -> dash.1.gz */ 'man ls' works now /*還嘗試重新安裝 mandb 和手冊頁無濟於事。
手動下載手冊頁文件可以解決問題，但必須有一些包或配置可以為我做到這一點。我該如何解決這個問題？
編輯 1
$ head -n 1000 /etc/dpkg/dpkg.cfg /etc/dpkg/dpkg.cfg.d/* ==> /etc/dpkg/dpkg.cfg <== # dpkg configuration file # # This file can contain default options for dpkg. All command-line # options are allowed. Values can be specified by putting them after # the option, separated by whitespace and/or an `=' sign. # # Do not enable debsig-verify by default; since the distribution is not using # embedded signatures, debsig-verify would reject all packages. no-debsig # Log status changes and actions to a file. log /var/log/dpkg.log ==> /etc/dpkg/dpkg.cfg.d/excludes <== # Drop all man pages path-exclude=/usr/share/man/* # Drop all documentation ... path-exclude=/usr/share/doc/* # ... except copyright files ... path-include=/usr/share/doc/*/copyright # ... and Debian changelogs path-include=/usr/share/doc/*/changelog.Debian.*
前兩行
/etc/dpkg/dpkg.cfg.d/excludes# Drop all man pages path-exclude=/usr/share/man/*導致安裝軟體包時刪除所有手冊頁。
要使手冊頁可用，您必須將第二行註釋掉：
# Drop all man pages # path-exclude=/usr/share/man/*然後重新安裝您想要手冊頁的任何軟體包：
apt --reinstall install man-db coreutils恢復
man和ls手冊頁（等等）。