For example, you may use ‘vim script.sh’ or ‘nano script.sh’ to open the file with vim editor or nano editor. First, we need to write the shebang line, which tells the operating system which shell command program to use to execute the following command lines. Then we may write ...
First, create a new bash shell file:nano read.shThen, fill it with the script below:#!/bin/bash echo "What is your age?" read age echo "Wow, you look younger than $age years old"In the above example, an age value was entered by the user. The output was then printed via the ...
区别很简单,就是bash和shell的关系。bash是shell的一种,除此之外还有zsh,fish等好多不同的shell。 所以,bash script是只能在bash环境下运行的script。 如何运行bash script 学习一门新语言最开始最想知道的必然是如何运行了。当然运行前得检查环境。 $echo$SHELL/bin/bash 如果已经是bash,那就没问题了,说明已经在...
printf “Please run this script with the BASH shell/n” >&2 exit 192 fi if test ! -x “$ls” ; then printf “$SCRIPT:$LINENO: the command $ls is not available — aborting/n “ >&2 exit 192 fi if test ! -x “$wc” ; then printf “$SCRIPT: $LINENO: the command $wc is ...
# (as an example). # 2) To invoke this shell script and redirect standard # output and standard error to a file (such as # test-bucket-1.out) do the following (the -s flag # is "silent mode" to avoid prompts to the user): ...
script.sh #!/bin/bash echo "My First Script!" 运行脚本 $ chmod 755 script.sh # chmod +x script.sh $ ./script.sh 好流弊 !你刚刚编写了你的第一个bash脚本。我知道你不理解这个脚本,特别对于脚本中的第一行。不要担心我将在本文中详细介绍shell脚本,在进入任何主题之前,我总是建议在脑海中形成路...
sh -x shellScript.sh 1. 2. 判断一条指令是否执行成功 netstat -lpntu | grep 80 echo $? #If output=0 --> 执行指令成功 #If output=1 --> 执行指令不成功 1. 2. 3. 4. if 语句 格式: if [ Param1 逻辑运算符 Param2 ] ...
In this example,RANDOM % 100generates a random number between 0 and 99. By adding 1 to the result (1 + RANDOM % 100), we shift the range to be between 1 and 100. Each time you run this script, a new random number within this range will be printed. ...
更加高级的shell编程 自带manual的bash脚本 一个好的脚本是应该自带说明manual的。例如,一个脚本需要运行的参数,参数的使用说明等。 下面给大家一个模板例子: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 bash getdata.sh *** This script needs arguments to work! *** Usage: getdata.sh PRJNUM COUNT...
cat"$script_dir/my_file" 同时,脚本不会更改工作目录的位置。如果脚本是从其他目录执行的,并且用户提供了指向某个文件的相对路径,我们仍然可以读取它。 Try to clean up 代码语言:javascript 代码运行次数:0 运行 AI代码解释 trap cleanupSIGINTSIGTERMERREXITcleanup(){trap-SIGINTSIGTERMERREXIT# script cleanup here...