MULTILINECOMMENT# 扩展单引号中被转义的字符串为ACSIIecho$'\n\n\n'# 变量赋值,使用命令执行结果,等同于echo `cat /etc/hostname`echo$(cat/etc/hostname)# 变量扩展或者置换${param}# 等同$param,特定情况下这种${param}的更严格的书写模式才工作${param:-default}# 建议这种,当param 被decare 但是没有...
Linux bash shell script block comment All In One Linux bash shell 脚本 多行注释 / 块级注释 https://stackoverflow.com/questions/43158140/way-to-create-multiline-
comment_example.sh #!/bin/bash # Add two numeric value ((sum=25+35)) #Print the result echo $sum 多行注释可以用: ' 注释内容 '来表达 multiline-comment.sh #!/bin/bash : ' The following script calculates the square value of the number, 5. ' ((area=5*5)) echo $area while while...
After executing the line, the bash script will be in a here document, PowerShell script will be in a multiline-comment, and the batch script will continue executing normally. After each language is done executing, we terminate it. This prevents us from needing to work around its quirks ...
The above script test for the first argument and would produce the following output when ran with and argument and without. [me@linux ~]$ bash myScript HelloGot Hello. Success![me@linux ~]$ bash myScriptmyScript: line 1: 1: Error: Argument not provided ...
How to read multi-line input in a Bash script?, If this is the only input, you could read until end of file. This is how most UNIX utilities work: #!/bin/bash echo "Pipe in certificate, or paste and it ctrl-d when done" keyvariable=$ (cat) If you want to continue reading thi...
s/^\(.*\)\n/line \1:/ }" To include on the same line, it is possible to use a single sed command, but due to the size of the script, it may result in poor performance. In this case, it is easier to use a second sed command, or alternatively, line numbering can be applied...
Comments are also useful when testing a script. Instead of deleting some lines or blocks, you can comment them out:# if [[ $VAR -gt 10 ]]; then # echo "Variable is greater than 10." # fi Copy Multiline Comments in Bash
The only exception to the # for comment rule is the #!/bin/bash line at the beginning of the scripts. It's calledshebangand it used to specify the interpreter to be used while running the script. There are different shells and the syntax may differ. So, a good practice is to specify...
Support for multi-line command output for thebashshellmergedin 16.5 To enable this feature, you have to set the feature flagFF_SCRIPT_SECTIONS. Multi-line command output is not currently available forpwsh. Work on that feature will be covered in follow on issue. Refer to thiscommentfor additi...