Bash Single vs. Double Quotes: What Are the Differences? Use single (') and double quotes (") in bash shell scripts or when executing commands directly in the terminal to instruct the shell how to interpret certain characters. SinceBashtreats single and double quotes differently, make sure to...
2. Double quote Double quotes work almost similar to single quotes. Almost because they also tend to ignore all the special characters except: Dollar signs $ Back quotes ` Backslashes \ Since dollar sign is not ignored, you can expect variable name to be substituted with its value. Which is...
9. 16.3. Double Quotes Double quotes in bash will suppress special meaning of every meta characters except "$", "\" and "`". Any other meta characters will be read literally. It is also possible to use single quote within double quotes. If we need to use double quotes within double qu...
在配置文件中,/C代表CTRL,/M代表ALT,/e代表ESC,//是反斜杠/,/'是单引号,/"是双引号; /C-control prefix/M-meta prefix/e an escape character// backslash/" literal ",adoublequote/’literal’,a single quote 如果要查看某一个功能键的字符序列可以通过[CTRL-V]来实现,或者输入cat后回车,进入编辑中...
14 changes: 14 additions & 0 deletions 14 single-vs-double-quotes.sh @@ -0,0 +1,14 @@ #!/bin/bash mystring="i want to replace hostname with livecd" myreplace="hostname" echo "single quote" echo $mystring | sed 's/$myreplace/livecd/g' echo "double quote" echo $mystring ...
It is important to note that$1has to be quoted in double quote, not single quote. '$1' expands to the first command line argument, as desired, while '$1' evaluates to literal string$1. 需要注意的是,$1必须使用双引号,而不是单引号。'$1'会按要求展开为第一个命令行参数,而'$1'会求值...
This does the following: the first single quote will close the opening single quote. Next you are concatenating a double quoted string, containing only a single quote -"'". Finally, you are reopening the single quote and continuing. That's pretty much the only thing you need to remember!
3.1.2.2 Single Quotes 3.1.2.3 Double Quotes 3.1.2.4 ANSI-C Quoting 3.1.2.5 Locale-Specific Translation 3.1.3 Comments 3.2.1 Reserved Words 3.2.2 Simple Commands 3.2.3 Pipelines 3.2.4 Lists of Commands 3.2.5 Compound Commands 3.2.5.1 Looping Constructs ...
Code tries to execute bash -c ''some_command'' instead of bash -c 'some_command' - Double single-quotes instead of double-quote or a single-quote causes this problem. #118401 #124041 #124007 - This one was incorrectly closed #123949 - This was closed as a duplicate of the previous ...
Execute/Run via: ./hello.sh World #!/usr/bin/env bash printf "Hello, %s\n" "$1" #> Hello, World It is important to note that $1 has to be quoted in double quote, not single quote. "$1" expands to the first command line argument, as desired, while '$1' evaluates to ...