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無法將整行回顯到文件

tag-icon • tag-icon command-line bash
無法將整行回顯到文件

我不知道如何將以下行回顯到文件中。只有部分內容進入文件。

echo perl -e "printf(\"%.1lf%%\n\", ($reserved_block_count * 100.0 ) / $block_count);">>Show_Percent_Reserved_Blocks.sh

當我運行下面的腳本時，我得到

andyk_~/Downloads$ Show_Percent_Reserved_Blocks.sh
/home/andy/bin/Show_Percent_Reserved_Blocks.sh: line 2: Block: command not found
/home/andy/bin/Show_Percent_Reserved_Blocks.sh: line 3: Reserved: command not found
syntax error at -e line 1, near "/ )"
Execution of -e aborted due to compilation errors.

#!/bin/bash
Block count:              421958912
Reserved block count:     4219589
perl -e "printf(\"%.1lf%%\n\", ($reserved_block_count * 100.0 ) / $block_count);"

答案1

問題是，當您使用雙引號時，變數引用 ( $reserved_block_count, $block_count) 在目前（呼叫）shell 環境中被擴展；你需要用單引號引用整個內容：

echo 'perl -e "printf(\"%.1lf%%\n\", ($reserved_block_count * 100.0 ) / $block_count);"' >>Show_Percent_Reserved_Blocks.sh

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