echo "The value of the variable 'name' is: $name": This line uses the "echo" command to print a message to the terminal. The message includes the text "The value of the variable 'name' is:" followed by the value of the 'name' variable. The variable's value is accessed using the...
nameref attribute)andvalueofany existing variablewiththe same name at a surrounding scope.Ifthereisno existing variable, the local variableisinitially unset. The following options can be usedtorestrict outputtovariableswiththe specified attributeortogive variables attributes: -aEachnameisan indexed array...
Bash functions differ from most programming languages when it comes to returning a value from a function. By default, bash returns the exit status of the last executed command in the function's body. The script below shows how to specify the exit status using return: 1. Create a script and...
Linked 49 Count number of lines of output from previous program Related 2 How to count the number of words and print the lines that match exactly a given pattern? 0 Take output field data string into variable 2 line(records) Count and grep together in a one command on a dat file ...
To see the exit status at the command prompt, echo the value “$?” A value of 0 means the expression evaluated as true, and a value of 1 means the expression evaluated as false. 变量具有各种类型属性,文件也有各种类型属性 ...
#Here we are reading the standard input and assigning it to the variable name with the read command. read name #We are now going back to standard output, by using echo and printing your name to the command line. echo "With standard input you have told me your name is: $name" ...
command1 command2 command3 done 或者 while [ condition ]; do command1 command...
bash shell 脚本执行的方法有多种,本文作一个总结,供大家学习参考。 假设我们编写好的shell脚本的文件名为hello.sh,文件位置在/data/shell目录中并已有执行权限。...方法二:以绝对路径的方式去执行bash shell脚本: /data/shell/hello.sh 方法三:直接使用bas...
atrm Delete jobs queued by the at command. audiosend Used to send an audio recording as an email. aumix An audio mixer utility. autoconf Generate configuration scripts from a TEMPLATE-FILE and send the output to standard output. autoheader Create a template header for configure. automake Create...
possible-variable-completions (C-x $) 列出point 之前的文本可能的補全,將它視為 shell 變量。 complete-hostname (M-@) 嘗試對 point 之前的文本進行補全,將它視為主機名。 possible-hostname-completions (C-x @) 列出point 之前的文本可能的補全,將它視為主機名。 complete-command (M-!) 嘗試對 point ...