test1.sh中的变量A并显示出来了。 其实直接运行脚本的方式产生的效果同使用bash指令的一样,关于这三种脚本的运行方式可以阅读Bash脚本的运行方式。 从上面的例子中不难发现,使用source的方式会发现,export后的变量变成了当前Shell的环境变量,可以在当前Shell环境下打印一下变量A。 [root@amt01 article002]#echo$A H...
From this example above, it is clear the child processes don’t inherit parent shell processes even when forked from the parent process. At this point, bash scripters introduce the export command. Hence, there is a new script, looking like the one below: You can see that the export command...
Return to Answer UseYou should checkGilles' answerfor all the details. In short, you can useevalinstead of$(): execute_cmd() {eval"$@"} Frombash manual: eval [arguments] The arguments are concatenated together into a single command, which is then read and executed, and its exit status ...
we have first defined the function name “func()” where we have set the echo command to print the statement “Bash shell script”. Then, on the next line of the shell, we used the
The export command is used to export variables to child processes.What does this mean?Suppose you have a variable TEST defined in this way:TEST="test"You can print its value using echo $TEST:But if you try defining a Bash script in a file script.sh with the above command:...
./script argument 例子: 显示文件名称脚本 ./show.sh file1.txt cat show.sh #!/bin/bash echo $1 (LCTT 译注:谢谢某匿名访客的提醒,原题有误,修改之。) 2) 如何在脚本中使用参数 ? 第一个参数 : $1,第二个参数 : $2 例子: 脚本会复制文件(arg1) 到目标地址(arg2) ...
./script argument 例子 : 显示文件名称脚本 ./show.sh file1.txt cat show.sh #!/bin/bash cat $1 2) 如何在脚本中使用参数 ? 第一个参数 : $1,第二个参 shell中export理解误区 一直以来,以为shell脚本中经过export后的变量会影响到执行这个shell的终端中的环境变量.环境变量这个概念不是shell所独有的...
command(1) comp_err(1) compare(1) composite(1) compress(1) config.guess(1) config.sub(1) config_data(1) conflict(1) conjure(1) constype(1) continue(1) convert(1) convmv(1) corelist(1) cp(1) cp(1g) cpack(1) cpan(1) cpan2dist(1) cpanp(1) cpio(1) cpp(1) cpp(1) cpu...
一般的script文件(.sh)即是这种用法。这种方法先启用新的sub-shell(新的子进程),然后在其下执行命令。 另外一种方法就是上面说过的source命令,不再产生新的shell,而在当前shell下执行一切命令。 source: source命令即点(.)命令。 在bash下输入man source,找到source命令解释处,可以看到解释"Read and execute comm...
or download the script manually using this command: curl"https://raw.githubusercontent.com/snatik/adb-export/master/adb-export.sh"-o adb-export.sh Then give the execution permission to the script and run it: $ chmod +x adb-export.sh $ ./adb-export.sh ...