个人认为Mac的键位比较符合人体工程学，用alt+c/v来复制粘贴的体感明显比用ctrl+c/v舒服。在Linux上使用Mac键位可以把ctrl映射到alt键上，但我觉得这样影响范围太大了，而且键位差距跟Mac其实也比较大。另一种方案是给每个常用的应用单独设置快捷键，这样可以做到跟Mac的键位很像。这里主要给出各种常用软件设置快捷键的方法。
KDE
设置 -> 键盘 -> 快捷键，一般只需要改编辑, 导航, 文件。上面有导出和导入的按钮，可以导出现在的快捷键，以后换电脑只需要导入就可以了。
不过这些快捷键应用里可能不认，在应用里还需要单独设置快捷键。
vscode
左下角小齿轮 -> 键盘快捷方式。可以在右上角打开键盘快捷方式(JSON)
这里给一个不完全列表：
{"key": "ctrl+-","command": "workbench.action.navigateBack","when": "canNavigateBack"},{"key": "ctrl+alt+-","command": "-workbench.action.navigateBack","when": "canNavigateBack"},{"key": "alt+-","command": "workbench.action.zoomOut"},{"key": "ctrl+-","command": "-workbench.action.zoomOut"},{"key": "alt+=","command": "workbench.action.zoomIn"},{"key": "ctrl+=","command": "-workbench.action.zoomIn"},{"key": "alt+c","command": "editor.action.clipboardCopyAction"},{"key": "ctrl+c","command": "-editor.action.clipboardCopyAction"},{"key": "alt+v","command": "editor.action.clipboardPasteAction"},{"key": "ctrl+v","command": "-editor.action.clipboardPasteAction"},{"key": "alt+right","command": "cursorLineEnd"},{"key": "alt+left","command": "cursorLineStart"},{"key": "alt+z","command": "undo"},{"key": "ctrl+z","command": "-undo"},{"key": "shift+alt+z","command": "redo"},{"key": "ctrl+shift+z","command": "-redo"},{"key": "alt+a","command": "editor.action.selectAll"},{"key": "ctrl+a","command": "-editor.action.selectAll"},{"key": "meta+right","command": "cursorWordRight"},{"key": "meta+left","command": "cursorWordLeft","when": "textInputFocus"},{"key": "ctrl+left","command": "-cursorWordLeft","when": "textInputFocus"},
Firefox
在地址栏输入about:keyboard，回车，在里面就可以改快捷键了。不过alt+t会打开菜单。要解决这个问题，在地址栏输入about:config，回车，然后在搜索框里输入ui.key.menuAccessKey，把18（代表alt）改成0，这样菜单就不会被触发了。需要使用菜单的时候再改回18即可。反正菜单用的少，应该没什么问题。
参考：
https://support.mozilla.org/en-US/kb/customize-keyboard-shortcuts-firefox
https://superuser.com/a/771061