文章目录

• linux_supplement of man(manpages)/获取linux命令用法示例的若干辅助命令行工具/网站/linux_python/pip检查
• • references
  • #安装bropages(gem&ruby based)
  • • #ruby 环境安装
    • #安装gem+bropages
    • 使用
    • • 获取帮助
    • 查询某个命令
    • • 示例:bro top
  • cheat(python pip based)
  • • • 检查pip3/python 可执行文件对应关系/别名
      • 检查pip版本
      • pip/python软连接检查
      • 更新pip版本
      • 更换安装来源(对于较新版本的pip)
    • pip问题排除
  • ltdr(nodejs based)
  • • ltdr工具介绍
    • • 获取帮助
    • 在线版tldr
    • 安装一个本地版本
  • manly(python based)

linux_supplement of man(manpages)/获取linux命令用法示例的若干辅助命令行工具/网站/linux_python/pip检查

references

• Good Alternatives To Man Pages Every Linux User Needs To Know (ostechnix.com)
  • 简单的安装ruby:How to Install Ruby on Ubuntu 20.04 {Step-by-Step} (phoenixnap.com)
• Install Cheat Command on Ubuntu 20.04 - kifarunix.com

#安装bropages(gem&ruby based)

• #直接复制本section(#用于注释,勿删)

#ruby 环境安装

sudo apt install ruby-full
# 检查版本
ruby --version

#安装gem+bropages

# gem可以安装bropages
sudo apt install gem
#环境准备完毕,开始下载build bropages
sudo gem install bropages

使用

获取帮助

bro -h

查询某个命令

bro <commandName>

示例:bro top

┌─[cxxu@cxxuAli] - [~] - [2022-04-11 11:44:19]
└─[0] <> bro top
/var/lib/gems/2.5.0/gems/commander-4.1.5/lib/commander/user_interaction.rb:328: warning: constant ::NIL is deprecated
commander-4.1.5/lib/commander/user_interaction.rb:328: warning: constant ::Bignum is deprecated
4 entries for top -- submit your own example with "bro add top"

# order by memory
top -o %MEM

        bro thanks      to upvote (4)
        bro ...no       to downvote (0)

......................................................................................................................................................................................

# monitor the process with pid 1, 2, and 3
top -p 1, 2, 3

        bro thanks 2    to upvote (5)
        bro ...no 2     to downvote (2)

......................................................................................................................................................................................

# Run the top command once, and only show the header and first 8 processes
# Can be further parsed with '| awk ...' in various scripts
top -n 1 | head -n 15

        bro thanks 3    to upvote (3)
        bro ...no 3     to downvote (1)

cheat(python pip based)

检查pip3/python 可执行文件对应关系/别名

• type pip3 pip py python3 python

┌─[cxxu@cxxuAli] - [~/.local/lib/python3.8/site-packages] - [2022-04-11 02:31:18]
└─[0] <> type pip3 pip py python3 python
pip3 is /usr/bin/pip3
pip is an alias for sudo py -m pip
py is /usr/bin/py
python3 is /usr/bin/python3
python is /usr/bin/python

检查pip版本

• pip[3] -V(大写的V选项)

┌─[cxxu@cxxuAli] - [~/.local/lib/python3.8/site-packages] - [2022-04-11 02:33:01]
└─[0] <> pip3 -V
pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.6)
┌─[cxxu@cxxuAli] - [~/.local/lib/python3.8/site-packages] - [2022-04-11 02:33:07]
└─[0] <> pip -V
pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.8)

• type pip3

• sudo pip3 install cheat

• 版本检查:cheat -v

• 获取帮助cheat -h

pip/python软连接检查

• type/whereis 可以用以查找python/pip路径
• ls -l 可以用来检查找到的路径是否为某个link

#( 04/11/22@ 3:30PM )( cxxu@cxxuAli ):~
   type python
python is /usr/bin/python
#( 04/11/22@ 3:30PM )( cxxu@cxxuAli ):~
   ls -l /usr/bin/python
lrwxrwxrwx 1 root root 9 Apr  5 17:52 /usr/bin/python -> python3.8
#( 04/11/22@ 3:31PM )( cxxu@cxxuAli ):~
   cd /usr/bin
#( 04/11/22@ 3:31PM )( cxxu@cxxuAli ):/usr/bin
   ls -l python
lrwxrwxrwx 1 root root 9 Apr  5 17:52 python -> python3.8
#( 04/11/22@ 3:31PM )( cxxu@cxxuAli ):/usr/bin
   ls -l py
lrwxrwxrwx 1 root root 9 Apr  5 16:18 py -> python3.8
#( 04/11/22@ 3:31PM )( cxxu@cxxuAli ):/usr/bin
   ls -l python3
lrwxrwxrwx 1 root root 9 Feb  8 14:51 python3 -> python3.6

更新pip版本

• 根据上述查看方式,选择合适的python版,执行py -m pip install --upgrade pip进行安装(py可以自行指定已安装的python版本)

更换安装来源(对于较新版本的pip)

• 较新版本支持 pip config
  • 譬如更换为阿里源
  • pip config set global.index-url https://mirrors.aliyun.com/pypi/simple/

pip问题排除

• 确保pip3安装且可用(sudo apt install python3-pip )

ltdr(nodejs based)

ltdr工具介绍

获取帮助

┌─[cxxu@cxxuAli] - [~] - [2022-04-11 02:08:13]
└─[0] <>  tldr -h
- Usage: tldr command [options]
Simplified and community-driven man pages...

在线版tldr

安装一个本地版本

• 环境预备:安装/配置nodejs&npm
• npm -g install ltdr

manly(python based)

• 解释您的命令所带的选项

┌─[cxxu@cxxuAli] - [~/.local/lib/python3.8/site-packages] - [2022-04-11 02:27:24]
└─[0] <> manly -h
usage: manly [-h] [-v] ...

Explain how FLAGS modify a COMMAND's behaviour.

positional arguments:
  command

optional arguments:
  -h, --help     show this help message and exit
  -v, --version  display version information and exit.
# 例子
example:
    $ manly rm --preserve-root -rf

    rm - remove files or directories
    ================================

        -f, --force
                ignore nonexistent files and arguments, never prompt

        --preserve-root
                do not remove '/' (default)

        -r, -R, --recursive
                remove directories and their contents recursively