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How do I copy a file in Python?
...odule
os.popen signature
os.popen(cmd[, mode[, bufsize]])
# example
# In Unix/Linux
os.popen('cp source.txt destination.txt')
# In Windows
os.popen('copy source.txt destination.txt')
os.system signature
os.system(command)
# In Linux/Unix
os.system('cp source.txt destination.txt')
# In Wi...
How to create empty text file from a batch file?
...ices, actually) that exist in every directory, NUL being the equivalent of UNIX's /dev/null: it's a magic file that's always empty and throws away anything you write to it. Here's a list of some others; CON is occasionally useful as well.
To avoid having any output at all, you can use
copy /y NUL...
Correct Bash and shell script variable capitalization
...est assured that you don't need to know every environment variable used by UNIX tools or shells in order to avoid overwriting them. If it's your variable, lowercase it. If you export it, uppercase it.
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mkdir's “-p” option
...can't find the answer to. I'm confused about what the -p option does in Unix. I used it for a lab assignment while creating a subdirectory and then another subdirectory within that one. It looked like this:
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How can I remove a trailing newline?
...ually removes the input record separator from the end. That's a newline on Unixy things, but may be different (e.g. Windows) and it's mutable. Is there a way to remove that value only once from the end of a string?
– brian d foy
Nov 8 '08 at 21:04
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How to redirect output with subprocess in Python?
...an read nothing.It can run on Windows.I can`t make sure that it can run on Unix.
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Why is #!/usr/bin/env bash superior to #!/bin/bash?
... recently, /usr/sbin/sendmail) binary available to process mail, it's in a Unix-like system's best interest to have /usr/bin/env because the env shebang is such common practice. It is a de facto standard interface.
– zigg
Feb 13 '16 at 14:51
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Compare two folders which has many files inside contents
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Diff command in Unix is used to find the differences between files(all types). Since directory is also a type of file, the differences between two directories can easily be figure out by using diff commands. For more option use man diff on y...
进程间通信（IPC）的几种方式 - C/C++ - 清泛网 - 专注C/C++及内核技术
...: 管道与系统IPC之间的优劣比较?
答: 管道: 优点是所有的UNIX实现都支持, 并且在最后一个访问管道的进程终止后,管道就被完全删除;缺陷是管道只允许单向传输或者用于父子进程之间.
系统IPC: 优点是功能强大,能在毫不相关进...
PHP优化杂烩 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...台服务器上，如此就有两个选择：一个是 TCP，另一个是 Unix Socket。
listen
和 TCP 比较，Unix Socket 省略了一些诸如 TCP 三次握手之类的环节，所以相对更高效，不过需要注意的是，在使用 Unix Socket 时，因为没有 TCP 对应的可靠...