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BLE协议—广播和扫描 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...向广播（ADV_IND）：可以被连接，可以回复扫描响应包，最常用的广播类型，适合大部分场景。
可连接的定向广播（ADV_DIRECT_IND）：可以被连接，不可以回复扫描响应包，适用于连接特定的主设备。
可扫描非定向广播（ADV_SCAN_IN...
How to detect if my shell script is running through a pipe?
... ]]
examining tty status via tty and tty -s
examining ssh status via [[ "$(ps -o comm= -p $PPID)" =~ 'sshd' ]]
Note that if you are using an OS that supports the /proc virtual filesystem, you might have luck following the symbolic links for STDIO to determine whether a pipe is being used or not. ...
How to make a Python script run like a service or daemon in Linux
... daemons/services, but I was under the impression that it (OS/init/init.d/upstart or what it is called) takes care of restarting a daemon when/if it ends/crashes.
– Mads Skjern
Mar 10 '16 at 10:32
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MongoDB与内存 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...是限制使用Swap：
shell> sysctl vm.swappiness=0
查看内存情况最常用的是free命令：
shell> free -m
total used free shared buffers cached
Mem: 32101 29377 2723 0 239 25880
-/+ buffers/cache: 32...
How to rotate the background image in the container?
...ddClass("rotate")
}, function() {
$(".arrow").removeClass("rotate")
})
PS: I've found this somewhere else but don't remember the source
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Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything
...x Docker's networking DNS config." Robin Winslow. Retrieved 2016-11-09. https://robinwinslow.uk/2016/06/23/fix-docker-networking-dns/
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How does “cat
I needed to write a script to enter multi-line input to a program ( psql ).
9 Answers
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
...n randomness: per the GNU docs, "By default these commands use an internal pseudo-random generator initialized by a small amount of entropy, but can be directed to use an external source with the --random-source=file option."
– Royce Williams
Nov 26 '15 at 6:11...
String.Join method that ignores empty strings?
...PT_SearchTerms;
And even with the glorious MS-SQL-Server it's possible (PS: that's sarcasm):
DECLARE @in_SearchTerm1 nvarchar(100)
DECLARE @in_SearchTerm2 nvarchar(100)
DECLARE @in_SearchTerm3 nvarchar(100)
DECLARE @in_SearchTerm4 nvarchar(100)
SET @in_SearchTerm1 = N'a'
SET @in_SearchTerm2...
The term 'Get-ADUser' is not recognized as the name of a cmdlet
...rver Administration Tools (KB958830). After installing do the following steps:
Open Control Panel -> Programs and Features -> Turn On/Off Windows Features
Find "Remote Server Administration Tools" and expand it
Find "Role Administration Tools" and expand it
Find "AD DS And AD LDS Tools" and...