工具与资源github.com
Bash 一行命令合集与终端技巧
Bash-oneliner: A collection of handy Bash one-liners and terminal tricks
2022 — 2024，它一次次回到首页
黑点是上首页（≥ 50 分）的那次投稿，空心点是没冲上去的投稿，点越大分数越高。
导读
这个 GitHub 仓库整理了大量实用的 Bash 单行命令和终端小技巧，方便在日常命令行工作中查找和组合使用。内容偏速查手册，评论区也补充了不少命令、工具和可移植性提醒。
为什么经久不衰：因为它把高频但零散的 shell 技巧集中成可检索的速查表，并有社区持续补充，所以多年后仍是命令行用户的实用参考。
HN 评论精选
补充了 $()、readlink -f、cp -a、lndir 等遗漏技巧，并解释 lndir 的符号链接复制用法。
我很惊讶这份（否则相当全面的）清单里居然没有 $()。虽然列出的少数命令用到了它，但它绝对值得单独成条。还有用 readlink -f 获取文件绝对路径（macOS 上不行；我找到的唯一替代是安装 greadlink）。以及 cp -a，它类似 cp -r，但会保留权限，意味着你可以前面加 sudo 而不用再费劲把所有权改回来。我也从没在这些清单里见过 lndir：它会复制一个目录，但目标目录中的所有非目录文件都会被替换成指回源文件的符号链接，而目录结构原样保留；也就是说，当你 cd 进去时，实际进入的是源目录的一个复制结构，而不是像直接给源文件夹做符号链接那样进入源目录本身。进去之后，任何你想修改又不影响原件的文件，只需要把符号链接换成文件，可以用 sed -i '' $symlink 做到。这样你就得到了一个实际效果上等于原目录副本的东西，而只有被修改的文件才真正占用空间（粗略地说）。看来我有几个 PR 要提。
archduck查看英文原文
I was surprised to see `$()` missing from this (otherwise quite extensive) list. There are a few commands listed which employ it, but it absolutely deserves its own entry. That and `readlink -f` to get the absolute path of a file. (Doesn't work on MacOS; the only substitute I've found is to install `greadlink`.) And `cp -a`, which is like `cp -r`, but it leaves permissions intact - meaning that you can prepend `sudo` without the hassle of changing the ownership back. I never see `lndir` on these lists either. It makes a copy of a directory, but all of the non-directory files in the target are replaced with symlinks back to the source while directories are preserved as-is. Meaning that when you `cd` into it, you are actually landing in a copied structure of the source directory instead of the source directory itself, as would be the case if you just symlinked the source folder. Once inside, any file you want to modify without affecting the original just needs you to create the symlink into a file, which you can do with `sed -i '' $symlink`. There you have it: effectively a copy of your original directory, with only the modified files actually taking up space (loosely speaking). Looks like I have a few pull requests to submit.
推荐 shellcheck、shfmt、sub、bashdb 等 Bash 工程化工具，并指出模块共享仍是缺口。
这些不算单行命令，但我发现有些工具对处理大型 Bash 代码库很有帮助：shellcheck 和 shfmt 用于检查和格式化；sub 用于组织子命令；bashdb 用于通过 VSCode 扩展交互式调试脚本。我仍然缺少像 ansible/terraform 那样与他人共享模块的方法，但还没找到最佳方式。
bfm查看英文原文
Not one-liners, but some of the tools that I have found helpful for working with large bash codebases are: - shellcheck and shfmt for linting and formatting - sub for organizing subcommands - bashdb for debugging scripts interactively via the VSCode extension I'm still missing a way to share modules with others like it can be done with ansible/terraform, but I have not found an optimal way to do it yet. [shellcheck] https://github.com/koalaman/shellcheck [shfmt] https://github.com/mvdan/sh [sub] https://github.com/qrush/sub [bashdb] http://bashdb.sourceforge.net/ [vscode-bash-debug] https://github.com/rogalmic/vscode-bash-debug
提醒 sed -i 的可移植性差异，并分享用转义序列设置终端/tmux 标题的技巧。
sed -i 要小心，这是 Linux 特有的写法，macOS 的 sed 会把它后面的内容当作备份表达式；据我所知，最安全的选择是始终指定备份扩展名，比如 sed -i~ 或 sed -i.bak，以保持可移植性，尽管有很多变通方法去检测到底是哪种并写 ${SED_I} -e whatever 之类的傻办法。我的贡献（我知道，去提 PR……）是我从脚本设置终端标题中获益很多：title() { printf '\033]0;%s\007' "$*"; }；tmux 也有一个：printf '\033]2;%s\007' "$*";。还有两个极其有用的资源：xfree86 控制序列文档和 iTerm2 转义码文档。
mdaniel查看英文原文
sed -i Watch out, that's a Linux-ism and macOS's sed will cheerfully use the thing after it as the backup expression; as far as I know, the absolute safest choice is to always specify a backup extension "sed -i~" or "sed -i.bak" to make it portable, although there are plenty of work-arounds trying to detect which is which and "$ {SED_I} -e whatever" type silliness My contribution (and yeah, I know, PR it ...) is that I get a lot of mileage out of setting the terminal title from my scripts: title() { printf '\033]0;%s\007' "$*"; } and there's one for tmux, too printf '\033]2;%s\007' "$*"; with the two infinitely handy resources: * https://www.xfree86.org/current/ctlseqs.html * https://iterm2.com/documentation-escape-codes.html
称赞合集全面，并推荐 Effective Shell 系列作为延伸学习材料。
这是一份很好且非常全面的合集。作为后续，我还可以推荐 Effective Shell 系列。我以前把 Part 1 里的导航快捷键图打印出来放在手边。
archielc查看英文原文
That's a nice and very extensive collection. As a follow-up, I can also recommend Effective Shell series. I used to have navigation shortcut diagram from Part 1 (https://dwmkerr.com/effective-shell-part-1-navigating-the-command-line/) printed out.
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