如何在 Linux shell 脚本中插入新行？
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How to insert a new line in Linux shell script?
提问by user3086014
I want to insert a new line between multiple echo statements. I have tried echo "hello\n", but it is not working. It is printing \n. I want the desired output like this:
我想在多个 echo 语句之间插入一个新行。我试过了echo "hello\n"，但它不起作用。它正在打印\n。我想要这样的所需输出：
Create the snapshots
Snapshot created
采纳答案by janos
The simplest way to insert a new line between echostatements is to insert an echowithout arguments, for example:
在echo语句之间插入新行的最简单方法是插入echo不带参数的，例如：
echo Create the snapshots
echo
echo Snapshot created
That is, echowithout any arguments will print a blank line.
也就是说，echo没有任何参数将打印一个空行。
Another alternative to use a single echostatement with the -eflag and embedded newline characters \n:
使用echo带有-e标志和嵌入换行符的单个语句的另一种替代方法\n：
echo -e "Create the snapshots\n\nSnapshot created"
However, this is not portable, as the -eflag doesn't work consistently in all systems. A better way if you really want to do this is using printf:
但是，这不是可移植的，因为该-e标志在所有系统中都不能一致地工作。如果您真的想这样做，更好的方法是使用printf：
printf "Create the snapshots\n\nSnapshot created\n"
This works more reliably in many systems, though it's not POSIX compliant. Notice that you must manually add a \nat the end, as printfdoesn't append a newline automatically as echodoes.
这在许多系统中更可靠，尽管它不符合 POSIX。请注意，您必须\n在末尾手动添加 a ，因为printf它不会像echo那样自动添加换行符。
回答by Kalanidhi
Use this echo statement
使用这个 echo 语句
echo -e "Hai\nHello\nTesting\n"
The output is
输出是
Hai
Hello
Testing
回答by Basile Starynkevitch
You could use the printf(1)command, e.g. like
您可以使用printf(1)命令，例如
printf "Hello times %d\nHere\n" $[2+3]
The ?printfcommand may accept arguments and needs a format control string similar (but not exactly the same) to the one for the standard Cprintf(3)function...
这 ？printfcommand 可以接受参数并需要一个与标准C printf(3)函数的格式控制字符串类似（但不完全相同）的格式控制字符串...
回答by Ohad Cohen
echo $'Create the snapshots\nSnapshot created\n'
