如果你想要在标准输出同时输出自定义的错误提示,可以使用复合命令(command grouping): cd /net || { echo "Can't read /net. Make sure you've logged in to the Samba network, and try again."; exit 1; } do_stuff more_stuff 注意,在{号和 echo 之间需要有一个空格,同时}之前要加上分号。 顺便...
$ bash -x script-name $ bash -x domains.sh 使用set 内置命令 bash shell 提供调试选项,可以打开或关闭使用 set 命令: set -x : 显示命令及其执行时的参数。 set -v : 显示 shell 输入行作为它们读取的 可以在 shell 脚本本身中使用上面的两个命令: #!/bin/bash clear # turn on debug mode set...
ShellCheck can make suggestions for improving the robustness of a script: rm -rf"$STEAMROOT/"*# Catastrophic rmtouch ./-l; ls *# Globs that could become optionsfind . -execsh -c'a && b {}'\;# Find -exec shell injectionprintf"Hello$name"# Variables in printf formatforfin$(ls *.tx...
Returns successifall of the NAMEs are found; failsifany are not found. ###假如所有的NAMEs都找到返回成功;假如任何一个未找到就返回失败。 typeset: typeset [-aAfFilrtux] [-p] name[=value] ... Set variable values and attributes. Obsolete. See `help declare'.[root@250-shiyan prog]# type...
a bash script forloop.sh is a bash script letsread.sh is a bash script manyloops.sh is a bash script math.sh is a bash script nested.sh is a bash script simpleelif.sh is a bash script simpleif.sh is a bash script simpleifelse.sh is a bash script vars.sh is a bash script ...
Bash Pitfalls[1]文章介绍了 40 多条日常 Bash 编程中,老手和新手都容易忽略的错误编程习惯。每条作者在给出错误的范例上,详细分析与解释错误的原因,同时给出正确的改写建议。文中有不少引用的文章,也值得大家仔细阅读。仔细阅读了这篇文章后,收获很多,不感独享,把这篇文章以半翻译半笔记的形式分享给大家。
当牵扯到很多脚本时,使用 trap 来检测 ERR 和 EXIT。...一个好的习惯是在脚本文件开头这样写,这会使它能够检测一些错误,并在错误发生时中断程序并输出信息: set-euo pipefailtrap"echo 'error: Script failed: see...这在检查一个充满配置文件的目录(如 /sys、/proc、/etc)时特别好用。...Strict mode:...
/bin/bash # declare STRING variable STRING="Hello World" #print variable on a screen echo $STRING Navigate to a directory where your hello_world.sh is located and make the file executable: $ chmod +x hello_world.sh Now you are ready to execute your first bash script:...
--no-use-server-timestamps don't set the local file's timestamp by the one on the server -S, --server-response print server response --spider don't download anything -T, --timeout=SECONDS set all timeout values to SECONDS --dns-timeout=SECS set the DNS lookup timeout to SECS -...
最简单地方法是禁用 histexpand 选项,你可以通过 set +H 或者 set +o histexpand 命令来完成。 下面四种写法都可以解决: 复制 # 1. 使用单引号echo'Hello World!'# 2. 禁用 histexpand 选项set+Hecho"Hello World!"# 3. 重置 histcharshistchars=# 4. 控制 shell 展开的顺序,命令行历史展开是在单词拆分...