Linux教程(20)- Linux中的Shell变量
2018-08-24 11:30:16 钱婷婷 阅读数 37更多
分类专栏： Linux教程与操作 Linux教程与使用
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变量 ![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1UQXpPVFV6TWpBNVAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1UQTBPVE0zTnpnMlAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1UQTFNRFF3TmpFeVAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
普通变量 ![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1UQTFOVEE1TnpBMlAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1UQTFOekV3TVRReFAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXdOVE0wTVRreVAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
环境变量 ![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXdOVFU1T1RjelAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXdOekExTXpjeFAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXhNVFE1TkRrL2QyRjBaWEp0WVhKckx6SXZkR1Y0ZEM5aFNGSXdZMGhOTmt4NU9XbGlSemx1VEcxT2VscEhOSFZpYlZZd1RETmtiR0ZZYUhCaWJEZ3dUV3BOTVUxRVVYbFBRVDA5TDJadmJuUXZOV0UyVERWTU1sUXZabTl1ZEhOcGVtVXZOREF3TDJacGJHd3ZTVEJLUWxGclJrTk5RVDA5TDJScGMzTnZiSFpsTHpjdy5qcGc%3D.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXhNalU0TXpReFAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXhPREUxTnpRL2QyRjBaWEp0WVhKckx6SXZkR1Y0ZEM5aFNGSXdZMGhOTmt4NU9XbGlSemx1VEcxT2VscEhOSFZpYlZZd1RETmtiR0ZZYUhCaWJEZ3dUV3BOTVUxRVVYbFBRVDA5TDJadmJuUXZOV0UyVERWTU1sUXZabTl1ZEhOcGVtVXZOREF3TDJacGJHd3ZTVEJLUWxGclJrTk5RVDA5TDJScGMzTnZiSFpsTHpjdy5qcGc%3D.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXhPVE01TVRZeFAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXlNVEEyT0RnMVAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXlNVE0yTkRjM1AzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
举例 ![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXlPVFF5TmpRMlAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
![[转帖]Linux教程(20)- Linux中的Shell变量](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhCekwybHRaeTFpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVGd3T0RJME1URXlPVFE1TWpreFAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05JVFRaTWVUbHBZa2M1Ymt4dFRucGFSelIxWW0xV01Fd3paR3hoV0dod1ltdzRNRTFxVFRGTlJGRjVUMEU5UFM5bWIyNTBMelZoTmt3MVRESlVMMlp2Ym5SemFYcGxMelF3TUM5bWFXeHNMMGt3U2tKUmEwWkRUVUU5UFM5a2FYTnpiMngyWlM4M01BPT0uanBn.jpg?w=700&webp=1 "[转帖]Linux教程(20)- Linux中的Shell变量")
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