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Is there replacement for cat on Windows
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Windows type command works similarly to UNIX cat.
Example 1:
type file1 file2 > file3
is equivalent of:
cat file1 file2 > file3
Example 2:
type *.vcf > all_in_one.vcf
This command will merge all the vcards into one.
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Differences between fork and exec
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The use of fork and exec exemplifies the spirit of UNIX in that it provides a very simple way to start new processes.
The fork call basically makes a duplicate of the current process, identical in almost every way. Not everything is copied over (for example, resource limits ...
Hidden Features of MySQL
...se types in a WHERE clause, it is best to do
WHERE datecolumn = FROM_UNIXTIME(1057941242)
and not
WHERE UNIX_TIMESTAMP(datecolumn) = 1057941242.
doing the latter won't take advantage of an index on that column.
http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html
UNIX...
Get current time as formatted string in Go?
...date in go (number of seconds from january 1970), the correct function is .Unix(), and it really return an integer
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127 Return code from $?
What is the meaning of return value 127 from $? in UNIX.
8 Answers
8
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What's the difference between [ and [[ in Bash? [duplicate]
...test)
works about the same as [ in all the other sh-based shells in many UNIX-like environments
only supports a single condition. Multiple tests with the bash && and || operators must be in separate brackets.
doesn't natively support a 'not' operator. To invert a condition, use a ! outs...
NOW() function in PHP
...y higher performance, but less usable for date/time manipulations
// From Unix timestamp
// Using date_create() with a Unix timestamp will give you a FALSE,
// and if you try to invoke format() on a FALSE then you'll get a:
// Fatal error: Call to a member function format() on boolean
// So...
File name? Path name? Base name? Naming standard for pieces of a path
...or Root Directory: Former is .NET convention while latter is more heard in UNIX circles. Though I like both I tend to use the former more. In windows, unlike UNIX, has many different root paths, one for each partition. Unix systems have one root directory which holds information on other directories...
How do I write a bash script to restart a process if it dies?
... processes that aren't their children.
There is a very good reason why in UNIX, you can ONLY wait on your children. Any method (ps parsing, pgrep, storing a PID, ...) that tries to work around that is flawed and has gaping holes in it. Just say no.
Instead you need the process that monitors your...
java中的缓存技术该如何实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的延续，是Aspect Oriented Programming的缩写，意思是面向方面编程。
官方网站 http://www.jboss.org/products/jbosscache
WhirlyCache
Whirlycache是一个快速的、可配置的、存在于内存中的对象的缓存。它能够通过缓...