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Which terminal command to get just IP address and nothing else?
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This will give you all IPv4 interfaces, including the loopback 127.0.0.1:
ip -4 addr | grep -oP '(?<=inet\s)\d+(\.\d+){3}'
This will only show eth0:
ip -4 addr show eth0 | grep -oP '(?<=inet\s)\d+(\.\d+){3}'
And this way you can get...
Remove carriage return in Unix
What is the simplest way to remove all the carriage returns \r from a file in Unix?
20 Answers
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Why is reading lines from stdin much slower in C++ than Python?
...tl;dr: Because of different default settings in C++ requiring more system calls.
By default, cin is synchronized with stdio, which causes it to avoid any input buffering. If you add this to the top of your main, you should see much better performance:
std::ios_base::sync_with_stdio(false);
Normall...
Set up a scheduled job?
...Django, and I'm curious if there is a way to schedule a job to run periodically.
24 Answers
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How can I put strings in an array, split by new line?
...ength=8)
Note that you have to use a double-quoted string, so \n is actually interpreted as a line-break.
(See that manual page for more details.)
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OSX - How to auto Close Terminal window after the “exit” command executed.
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You can also select all the profiles, and make the change to all at once.
– user2191247
Jun 8 '18 at 14:34
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Print a file, skipping the first X lines, in Bash [duplicate]
...reat-big-file.log
< Last 10 lines of great-big-file.log >
If you really need to SKIP a particular number of "first" lines, use
$ tail -n +<N+1> <filename>
< filename, excluding first N lines. >
That is, if you want to skip N lines, you start printing line N+1. Example:
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Good tool to visualise database schema? [closed]
...om). It works with a variety of databases including SQLite, and their EULA allows the free version to be used for commercial projects.
– Aralox
Jul 29 '16 at 5:05
add a commen...
Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... eth0 (bnx2):Broadcom NetXtreme II BCM5709 Gigabit Ethernet,1000Mb/s
OS: RHEL Server 5.4 (Tikanga), Linux 2.6.18-164.el5 x86_64, 64-bit
服务端程序很简单，基于nginx写的一个comet模块，该模块接受用户的请求，然后保持用户的连接，而不返回...
Setting DEBUG = False causes 500 Error
...erver), and there is no error info in Apache error log and it will run normally when I change debug to True .
31 Answer...