read variable_name 其中,variable_name是你自定义的变量名,用于保存用户输入的值。读取用户输入后,可以通过该变量名来获取输入的内容。 以下是获取用户输入的完整示例代码: 代码语言:txt 复制 #!/bin/bash echo "Please enter your name: " read name echo "Hello, $name! How are you?" 在上述代码中,用户...
In the context where an assignment statement is assigning a value to a shell variable or array index, the += operator can be used to append to or add to the variable's previous value. When += is applied to a variable for which the inte- ger attribute has been set, value is ...
While ShellCheck is mostly intended for interactive use, it can easily be added to builds or test suites. It makes canonical use of exit codes, so you can just add ashellcheckcommand as part of the process. For example, in a Makefile: check-scripts:# Fail if any of these files have w...
{varilable#*pattern}: 查找variable中自左而右第一次被pattern匹配到的串,将此串及向左的所有内容都删除{varilable##*pattern}: 查找variable中自左而右最后一次被pattern匹配到的串,将此串及向左的所有内容都删除 {varilable%pattern*}:查找variable中自右而左第一次被pattern匹配到的串,将此串及向右的所有...
25 ip addr add $IPADD/$MASK dev $1 label $ALS 26 if [ $V == 1 ];then 27 ip addr show $1 28 fi 5、创建/etc/rc.d/init.d/network服务脚本 1 #!/bin/bash 2 # 3 #chconfig: 35 09 90 #设定启动级别3|5,启动优先级09,关闭优先级90 ...
This section briefly describes the builtins which Bash inherits from the Bourne Shell, as well as the builtin commands which are unique to or have been extended in Bash. 这部分简短地描述了继承自bourne shell的bash的内置命令,还有一些独特的或已被bash扩展的内置命令。
2. Add the code below to the shell script: # syntax.sh# Declaring functions using the reserved word function# Multilinefunctionf1 {echoHello I\'m function 1 echo Bye! } # One line function f2 { echo Hello I\'mfunction2;echoBye!; }# Declaring functions without the function reserved wor...
string="Programming" #Add the variable in the middle of the string echo"Bash$stringLanguage" Output: Run the script by bash command. $bashconcat2.sh The following output will appear after executing the script. Example-3: Using shorthand ‘+=’ operator to combine string ...
If you want to detect bash-preexec in your library (for example, to add hooks topreexec_functionswhen available), use the Bash variablebash_preexec_imported: if[[-n"${bash_preexec_imported:-}"]];thenecho"Bash-preexec is loaded."fi ...
Using options to enter data First, add a variable and initialize it. Add the two lines shown in bold in the segment of the program shown below. This initializes the$Namevariable to "world" as the default. <snip> ### ### # Main program # ###...