更新 echo 命令
@@ -57,3 +57,10 @@ echo 可以显示变量的值:
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| \r | 回车 |
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| \\ | 反斜杠字符本身 |
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`echo -n "Progress: ["`
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`for i in {1..20}; do`
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`echo -n "#"`
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`sleep 0.1`
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`done`
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`echo "] Done!"`
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