https://blog.youkuaiyun.com/S_Wiperzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/S_Wiper/article/details/151962621https://blog.youkuaiyun.com/S_Wiper/article/details/151962621S_WiperMon, 22 Sep 2025 14:23:05 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/151754175https://blog.youkuaiyun.com/S_Wiper/article/details/151754175S_WiperTue, 16 Sep 2025 15:19:56 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/151715492https://blog.youkuaiyun.com/S_Wiper/article/details/151715492S_WiperMon, 15 Sep 2025 16:34:58 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/144282752https://blog.youkuaiyun.com/S_Wiper/article/details/144282752S_WiperFri, 06 Dec 2024 10:08:27 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/144231715https://blog.youkuaiyun.com/S_Wiper/article/details/144231715S_WiperWed, 04 Dec 2024 10:35:47 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/140451178https://blog.youkuaiyun.com/S_Wiper/article/details/140451178S_WiperMon, 15 Jul 2024 23:13:06 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/130559917https://blog.youkuaiyun.com/S_Wiper/article/details/130559917S_WiperMon, 08 May 2023 15:37:49 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/129139100https://blog.youkuaiyun.com/S_Wiper/article/details/129139100S_WiperTue, 21 Feb 2023 11:15:08 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/129135644https://blog.youkuaiyun.com/S_Wiper/article/details/129135644S_WiperTue, 21 Feb 2023 11:10:51 +0800;最常见的应该是：echo $PATH了，表示打印该shell中存在的环境变量。${var_name} 跟 $var_name差不多，但是用 ${ }会比较精确的界定变量名称的范围。你可以写一个非常复杂的表达式，这个表达式中，你可以定义许多参数，然后你可以用call函数来向这个表达式传递参数。在bash中，$( )与``（反引号）都是用来作命令替换的，执行括号或者反引号中的命令, 然后返回结果。]]>https://blog.youkuaiyun.com/S_Wiper/article/details/128966934https://blog.youkuaiyun.com/S_Wiper/article/details/128966934S_WiperFri, 10 Feb 2023 11:30:37 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/128897984https://blog.youkuaiyun.com/S_Wiper/article/details/128897984S_WiperMon, 06 Feb 2023 13:49:39 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/127223819https://blog.youkuaiyun.com/S_Wiper/article/details/127223819S_WiperSun, 09 Oct 2022 17:15:47 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/127207101https://blog.youkuaiyun.com/S_Wiper/article/details/127207101S_WiperSun, 09 Oct 2022 11:11:23 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/73197910https://blog.youkuaiyun.com/S_Wiper/article/details/73197910S_WiperWed, 14 Jun 2017 07:54:57 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/73135462https://blog.youkuaiyun.com/S_Wiper/article/details/73135462S_WiperMon, 12 Jun 2017 19:29:18 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/73124245https://blog.youkuaiyun.com/S_Wiper/article/details/73124245S_WiperMon, 12 Jun 2017 17:03:34 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/73104892https://blog.youkuaiyun.com/S_Wiper/article/details/73104892S_WiperMon, 12 Jun 2017 13:48:40 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/73087114https://blog.youkuaiyun.com/S_Wiper/article/details/73087114S_WiperMon, 12 Jun 2017 07:26:43 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/73087110https://blog.youkuaiyun.com/S_Wiper/article/details/73087110S_WiperMon, 12 Jun 2017 07:15:45 +0800https://blog.youkuaiyun.com/S_Wiper/article/details/72953243https://blog.youkuaiyun.com/S_Wiper/article/details/72953243S_WiperFri, 09 Jun 2017 08:15:14 +0800