行号 lineItem=$(grep -nE "$keyword" $filename | head -1 | awk -F ":" '{print$1}') while [ -n $lineItem ] do echo "lineItem:${lineItem}" # lineItem为空时跳出循环,到达结尾,不再处理 if [ -z "$lineItem" ] then break fi # lineItem小于等于0时说明到达结尾,不再处理 if [...
方法一：切换到shell脚本所在的目录（此时，称为工作目录）执行shell脚本： cd /data/shell ./hello...
To let the shell know that it should run commands using the bash interpreter, start the script with this line:#!/bin/bashImportant! If you want to run bash scripts on a virtual private server, connect to it via an SSH client. The next step is to write and compile the commands in a...
expr也是一个手工命令行计数器。 [root@localhost script]# expr 10 + 10 20 [root@localhost script]# expr 10 - 8 2 [root@localhost script]# expr 2 \* 3 反斜线屏蔽其特定含义 6 [root@localhost script]# expr 30 / 3 / 2 5 seq 用法:seq [选项]... 尾数 或:seq [选项]... 首数 尾...
Command-Line Options When using theansicommand from a shell script or a prompt, there are a plethora of different options you can use. The syntax for using these options is as follows: ansi [OPTIONS] [TEXT TO DISPLAY] All options must be placed first. See the Examples section for more ...
echo "-u: Update the script" echo echo "If run by root: datafiles in /Library/OpenPorts are created, but no output." echo "If run by any other user: output is displayed based on those datafiles." echo echo "This script is supposed to be used in conjunction with a launchd-component...
Hi, Having a bit of difficulty executing a bash script from the pre-commit hook. I can see that the file is being run, but it always exits from the else clause when running with Husky. If I run the file manually, it does the validation c...
In larger scripts, you might need to process large amounts of data stored in arrays. For instance, you might have a script that reads lines from a file into an array and then processes each line individually. In such cases, knowing how to loop through arrays in Bash is invaluable. ...
Writing comments in Bash scripts is important for documenting the code, making it easier for others to understand the script’s functionality and for future reference. Q. How can I write a single-line comment in Bash? To write a single-line comment in Bash, use the “#” symbol at the ...
The $LINENO contains the line number in the script or shell function currently executing. ### Example script ### Filename: example-debug #!/usr/bin/env bash debug() { echo "Func BASH_SOURCE: ${!BASH_SOURCE[@]} ${BASH_SOURCE[@]}" echo "Func BASH_LINENO: ${!BASH_LINENO[@]} $...