Ending a script with exit 127 would certainly cause confusion when troubleshooting (is the error code a "command not found" or a user-defined one?). However, many scripts use an exit 1 as a general bailout-upon-error. Since exit code 1 signifies so many possible errors, it is not ...
# Performs the test-bucket number 1 for Product X. # (Actually, this is a sample shell script, # which invokes some system commands # to illustrate how to construct a Bash script) # # Notes: # 1) The environment variable TEST_VAR must be set # (as an example). # 2) To invoke ...
# Clear screen on script exit. trap 'printf \\e[2J\\e[H\\e[m' EXIT 忽略终端中断(CTRL + C,SIGINT) trap '' INT 对窗口调整大小做出反应 # Call a function on window resize. trap 'code_here' SIGWINCH 在每个命令之前做点什么 trap 'code_here' DEBUG 当shell函数或源文件完成执行时执行某些...
# This script loops through the file /etc/passwd line by line 注意⚠️continue用于结束本次循环break用于结束整个循环 参数传递 当我们运行脚本的时候,可以传递参数供脚本内部使用$ ./script.sh param1 param2 param3 param4这些参数将被存储在特殊的变量中 $0 -- "script.sh" $1 -- "param1" $2 ...
将bash脚本粘贴到控制台,而不使用exit调用 是指在命令行界面中直接将bash脚本内容粘贴到终端,而不使用exit命令来执行脚本。 Bash脚本是一种在Linux和Unix系统中常用的脚本语言,用于自动化执行一系列命令和操作。通常情况下,我们可以通过在终端中输入脚本文件的路径来执行脚本,或者使用bash命令来执行脚本。而将脚本...
n1=`echo$n|sed s'/[0-9]//'g`#空输入检测if[ -z"$n"]thencontinuefi#非数字输入检测if[ -n"$n1"]thenexit0fibreakdonecase$nin1)date;; 2)ls;; 3)who;; 4)pwd;; 0)break;;#输入数字非1-4的提示*)echo"please input number is [1-4]"esac ...
SECONDS SECONDS returns a count of the number of (whole) seconds the shell has been running. In the case of a shell script, this is the time that the script itself, not the shell which called it, has been running. If you change the value of SECONDS to another integer, it will keep...
trap 'code_here' SIGWINCH在命令之前执行某些操作trap 'code_here' DEBUG在shell函数或源文件完成执行时执行某些操作trap 'code_here' RETURN性能禁用Unicode码如果不需要unicode,则可以禁用它以提高性能。结果可能会有所不同,但是neofetch 和其他程序有明显改善。# 禁用unicode. LC_ALL=C LANG=C已...
To install or update nvm, you should run the install script. To do that, you may either download and run the script manually, or use the following cURL or Wget command:curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash...
Bash script template(Bash脚本模板) #!/usr/bin/env bash set -Eeuo pipefail trap cleanup SIGINT SIGTERM ERR EXIT script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P) usage() { cat <<EOF Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p ...