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But what exactly differentiates a login shell from a non-login shell? $0 has the string value of the command itself, something like script,. /script, … Im having trouble with escaping characters in bash. 2. 健壮shell的几点建议如果秉承着能跑就行的态度写shell脚本，是很自在的，但是如果你想要写出健壮，可靠的shell脚本，可没那么容易。那么有什么可操作的经验或者方法吗？而为了保证脚 … What is the significance of this term? · when going through one shell script, i saw the term $?. Id like to escape single and double quotes while running a command under a different user. I have code such as if [ $# -eq 0 ] then i want to understand what $# means, but google search is very bad for searching these kinds of things. What does $# mean in shell? · ご提示のurlで示される情報を拝見しましたが、「直前に実行したコマンドの終了値」と言う意味では一貫していました。「他の値もある」と言うのは、「0は成功、1は失敗 … Whats reputation and how do i get … Youll need to complete a few actions and gain 15 reputation points before being able to upvote. Shell脚本：除了手动输入命令，用户还可以编写shell脚本，这是包含一系列shell命令的文本文件。通过运行脚本，用户可以批量执行一系列命令，从而自动化和简化任务。然后再来看看他 … · the shell command and any arguments to that command appear as numbered shell variables: For the purposes of this question lets say i … · i understand the basic difference between an interactive shell and a non-interactive shell. Upvoting indicates when questions and answers are useful.