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How to delete from a text file, all lines that contain a specific string?
How would I use sed to delete all lines in a text file that contain a specific string?
17 Answers
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Are there any standard exit status codes in Linux?
...ld died with 11" */
}
How are you determining the exit status? Traditionally, the shell only stores an 8-bit return code, but sets the high bit if the process was abnormally terminated.
$ sh -c 'exit 42'; echo $?
42
$ sh -c 'kill -SEGV $$'; echo $?
Segmentation fault
139
$ expr 139 - 128
11
I...
How do I write unit tests in PHP? [closed]
...ey are, but for some reason I can't seem to figure out how exactly I'm supposed to test something. Could someone perhaps post a piece of example code and how they would test it? If it's not too much trouble :)
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Real differences between “java -server” and “java -client”?
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This is really linked to HotSpot and the default option values (Java HotSpot VM Options) which differ between client and server configuration.
From Chapter 2 of the whitepaper (The Java HotSpot Performance Engine Architecture):
The JD...
How to ignore certain files in Git
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How to ignore new files
Globally
Add the path(s) to your file(s) which you would like to ignore to your .gitignore file (and commit them). These file entries will also apply to others checking out the repository.
Locally
Add the path(s) to your file(...
What is the difference between the operating system and the kernel? [closed]
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The kernel is part of the operating system and closer to the hardware it provides
low level services like:
device driver
process management
memory management
system calls
An operating system also includes applications like the user interface (shell, gui, tools, and ser...
How to fix Terminal not loading ~/.bashrc on OS X Lion [closed]
...means, ~/.bash_profile will get executed, ~/.bashrc not.
The solution on most systems is to "require" the ~/.bashrc in the ~/.bash_profile: just put this snippet in your ~/.bash_profile:
[[ -s ~/.bashrc ]] && source ~/.bashrc
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苹果Mac OS怎么关闭Fn键？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
苹果Mac OS怎么关闭Fn键？
Mac 关闭Fn键
Mac OS del键如何向后删除？win下的del键在mac下的哪个键可以实现？ - 更多...
Mac OS del键如何向后删除？win下的del键在mac下的哪个键可以实现？苹果的delete键相当于windows的backspace，Fn+delete才相当于windows的delete。苹果的delete键相当于windows的backspace，Fn+delete才相当于windows的delete。Mac del键 向后删除
mac os下如何获得root权限？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
mac os下如何获得root权限？操作步骤：1.打开实用工具 －> 终端2.键入sudo passwd root 然后提示你输入当前登录用户密码，通过以后，提示你输入两遍root的密码。...操作步骤：
1.打开实用工具 －> 终端
2.键入sudo passwd root 然后提示你...