No manual entry for ls解决办法
如果在 Linux 中运行 man ls 命令时提示“no manual entry for ls”，则可能是因为您的系统没有安装 man 页面或者该页面已经被删除。此外，也有可能是您输入的命令不是标准命令。
可以通过以下方式进行排查：
1.确认 man 是否已安装
使用以下命令检查系统中是否已安装 man 命令：
which man • 1
如果命令输出了 man 的路径，则表示 man 命令已经安装在系统中。
2.确认 ls 是否为标准命令
有些自定义的命令可能无法在 man 页面中找到，这是因为它们不是标准命令。使用以下命令确定 ls 是否为标准命令：
type -a ls • 1
如果命令输出了 /bin/ls 或者 /usr/bin/ls，则表示 ls 是标准命令。
3.安装缺失的 man 页面
系统默认安装的 manpage 不够齐全。以 Ubuntu 为例，可以按照如下方式进行安装：
sudo apt install manpages-dev glibc-doc manpages-posix manpages-posix-dev
jetsontx2nx606@jetsontx2nx606-desktop:~$ sudo apt install manpages-dev glibc-doc manpages-posix manpages-posix-dev Reading package lists... Done Building dependency tree Reading state information... Done manpages-dev is already the newest version (4.15-1). manpages-dev set to manually installed. The following packages were automatically installed and are no longer required: activity-log-manager libgeonames-common libgeonames0 libnm-gtk0 libpinyin-data libpinyin13 libtimezonemap-data libtimezonemap1 libunity-control-center1 Use 'sudo apt autoremove' to remove them. The following NEW packages will be installed: glibc-doc glibc-doc-reference manpages-posix manpages-posix-dev 0 upgraded, 4 newly installed, 0 to remove and 197 not upgraded. Need to get 8,228 kB of archives. After this operation, 19.6 MB of additional disk space will be used. Get:1 http://ports.ubuntu.com/ubuntu-ports bionic/multiverse arm64 manpages-posix all 2013a-2 [929 kB] Get:2 http://ports.ubuntu.com/ubuntu-ports bionic/multiverse arm64 manpages-posix-dev all 2013a-2 [1,794 kB] Get:3 http://ports.ubuntu.com/ubuntu-ports bionic/main arm64 glibc-doc-reference all 2.27-1 [5,483 kB] Get:4 http://ports.ubuntu.com/ubuntu-ports bionic-updates/main arm64 glibc-doc all 2.27-3ubuntu1.6 [22.2 kB] Fetched 8,228 kB in 7s (1,232 kB/s) debconf: delaying package configuration, since apt-utils is not installed Selecting previously unselected package manpages-posix. (Reading database ... 192285 files and directories currently installed.) Preparing to unpack .../manpages-posix_2013a-2_all.deb ... Unpacking manpages-posix (2013a-2) ... Selecting previously unselected package manpages-posix-dev. Preparing to unpack .../manpages-posix-dev_2013a-2_all.deb ... Unpacking manpages-posix-dev (2013a-2) ... Selecting previously unselected package glibc-doc-reference. Preparing to unpack .../glibc-doc-reference_2.27-1_all.deb ... Unpacking glibc-doc-reference (2.27-1) ... Selecting previously unselected package glibc-doc. Preparing to unpack .../glibc-doc_2.27-3ubuntu1.6_all.deb ... Unpacking glibc-doc (2.27-3ubuntu1.6) ... Setting up glibc-doc-reference (2.27-1) ... Setting up glibc-doc (2.27-3ubuntu1.6) ... Setting up manpages-posix (2013a-2) ... Setting up manpages-posix-dev (2013a-2) ... Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
4.如果仍然无法运行，则需要手动安装man手册页
4.1.首先从官网链接下载最新版的man手册源码包
wget https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/man-pages-6.03.tar.gz
4.2.解压源码包
tar -xzvf man-pages-6.03.tar.gz
4.3.安装man手册
#进入目标目录 cd man-pages-6.03/ #切换到root用户 su #安装 make install • 1 • 2 • 3 • 4 • 5 • 6
这样就能正常运行了。
