bash echo newline 答案您可以使用printf代替: printf "hello\nworld\n" printf具有比echo更一致的行为。 echo的行为在不同版本之间变化很大。 你确定你在 bash 吗?这三种方式对我有用: echo -e "Hello\nworld" echo -e 'Hello\nworld' echo Hello$'\n'worldecho $'
When you echo a piece of text, the echo command will automatically add a newline (and here is how you can prevent it) to the end of your text. This means that you can chain multiple echo commands together to cause a newline. $ echo Hello; echo world Hello world Copy Use printf to...
查看PATH的内容可用 echo $PASH 命令。现在的/data/shell就不在环境变量PASH中的，所以必须加上./才可...
#!/bin/bash # this bash script is backup a general user's home directory to /tmp/ user=$(whoami) input=/home/$user output=/tmp/${user}_home$(date +%Y-%m-%d_%H%M%S).tar.gz function total_files { find $1 -type f | wc -l } function total_directory { find $1 -type d | ...
在Bash脚本中,意外标记"do"附近出现语法错误通常是由于以下几种情况引起的: 1. 语法错误:可能是由于缺少关键字、括号不匹配、缺少分号等语法错误导致的。在检查脚本时,需要仔细检查do语句前面的...
[root@linux ~]# echo $test_name root <== 加上‘:’后若变量内容为空或者是未设定,都能够以后面的内容替换! 基本上这种变量的测试也能够透过 shell script 内的 if...then... 来处理,不过通过上述提及的简单的方法来测试变量,是程序看起来更精简一些!
element in the array. The"${array[@]}"syntax is used to access all elements in the array. For each iteration, the current element’s value is stored in theivariable, which we then print out using theechocommand. This results in each item in the array being printed on a new line. ...
[root@linux ~]# echo $test_name root <== 加上‘:’后若变量内容为空或者是未设定,都能够以后面的内容替换! 基本上这种变量的测试也能够透过 shell script 内的 if...then... 来处理,不过通过上述提及的简单的方法来测试变量,是程序看起来更精简一些!
echo"Hello, world!" Now from the command line, run the script using thebashinterpreter: bashhello-world You'll see the script has run successfully from the output. Hello, world! That's it, you've created your first script! Executable Scripts ...
# Use bash for the shell SHELL ["/bin/bash", "-o", "pipefail", "-c"] # Create a script file sourced by both interactive and non-interactive bash shells ENV BASH_ENV /home/user/.bash_env RUN touch "${BASH_ENV}" RUN echo '. "${BASH_ENV}"' >> ~/.bashrc # Download and ...