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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...个界面访问操作系统内核的服务。Ken Thompson的sh是第一种Unix Shell,Windows Explorer是一个典型的图形界面Shell。 shell脚本(shell script),是一种为shell编写的脚本程序。业界所说的shell通常都是指shell脚本,但读者朋友要知道,shell和...
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Converting datetime.date to UTC timestamp in Python

... For unix systems only: >>> import datetime >>> d = datetime.date(2011,01,01) >>> d.strftime("%s") # <-- THIS IS THE CODE YOU WANT '1293832800' Note 1: dizzyf observed that this applies localized ...
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How to validate IP address in Python? [duplicate]

... Note that this is a unix-only answer – cowlinator Feb 23 '18 at 20:40 2 ...
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How to extract epoch from LocalDate and LocalDateTime?

... 'Millis since unix epoch' represents an instant, so you should use the Instant class: private long toEpochMilli(LocalDateTime localDateTime) { return localDateTime.atZone(ZoneId.systemDefault()) .toInstant().toEpochMilli(); } ...
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Git - How to close commit editor?

...st press Esc Button and then write :wq or :wq! and then Enter to close the unix file. share | improve this answer | follow | ...
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How to use the same C++ code for Android and iOS?

...atedString, CPP_BASE_STRING, myString); return concatenatedString; } Unix An interesting bonus is, we can also use the same code for Linux and Mac as well as other Unix systems. This possibility is especially useful because we can test our shared code faster, so we are going to create a Main....
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How to count lines in a document?

... The tool wc is the "word counter" in UNIX and UNIX-like operating systems, but you can also use it to count lines in a file by adding the -l option. wc -l foo will count the number of lines in foo. You can also pipe output from a program like this: ls -l | wc -...
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What are the differences among grep, awk & sed? [duplicate]

... the differences between grep , awk and sed in terms of their role in Unix/Linux system administration and text processing. ...
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Git On Custom SSH Port

... When you want a relative path from your home directory (on any UNIX) you use this strange syntax: ssh://[user@]host.xz[:port]/~[user]/path/to/repo For Example, if the repo is in /home/jack/projects/jillweb on the server jill.com and you are logging in as jack with sshd listening on por...
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Can you change what a symlink points to after it is created?

...s "no". EDIT: The following is copied from Arto Bendiken's answer over on unix.stackexchange.com, circa 2016. This can indeed be done atomically with rename(2), by first creating the new symlink under a temporary name and then cleanly overwriting the old symlink in one go. As the man page states: ...