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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
... will vary with OS used, machine specs, awk implementation used (e.g., the BSD awk version used on OSX is usually slower than GNU awk and especially mawk), this should provide a general sense of relative performance.
Input file is a 1-million-lines file produced with seq -f 'line %.0f' 1000000.
Tim...
How to remove files and directories quickly via terminal (bash shell) [closed]
...at what you're learning applies to bash on every Unix OS: OS X, Linux, FreeBSD, etc. In fact, rm's syntax is the same in pretty much every shell on every Unix OS. OS X, under the hood, is really a BSD Unix system.
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How to check if running in Cygwin, Mac or Linux?
... ($(uname_S),Linux)
CFLAGS += -DNDEBUG
endif
ifeq ($(uname_S),GNU/kFreeBSD)
CFLAGS += -D_BSD_ALLOC
endif
ifeq ($(uname_S),UnixWare)
CFLAGS += -Wextra
endif
...
See also this complete answer about uname -s and Makefile.
The correspondence table in the bottom of this answer is from Wikipe...
What is the list of possible values for navigator.platform as of today? [closed]
... Android 4.1.2 Linux armv7l
Samsung Galaxy S3 Android 4.3 Linux armv7l
Samsung Galaxy S4 Android 4.4.2 Linux armv7l
Samsung Galaxy Note 3 Android 4.4.2 Linux armv7l
Samsung Galaxy S6 Android 5 Linux aarch64
Nexus 4 ...
How to use/install gcc on Mac OS X 10.8 / Xcode 4.4
...ommand from your terminal:
xcode-select --install
Starting with Xcode 4.3 - you must now manually install command line tools from Xcode menu > Preferences > Downloads.
Alternatively, there are stand-alone installation packages both for Mountain Lion (10.8) and for Mavericks (10.9).
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Should I use Vagrant or Docker for creating an isolated environment? [closed]
...itive.
The only reason you could want to use Vagrant is if you need to do BSD, Windows or other non-Linux development on your Ubuntu box. Otherwise, go for Docker.
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What's the difference between %s and %d in Python string formatting?
...converted to string
Consider the following code
name ='giacomo'
number = 4.3
print('%s %s %d %f %g' % (name, number, number, number, number))
the out put will be
giacomo 4.3 4 4.300000 4.3
as you can see %d will truncate to integer, %s will maintain formatting, %f will print as float and %...
Find and replace with sed in directory and sub directories
...n GNU sed, looks like there's no space between -i and its argument, but in BSD sed there is… so BSD -i '' 's/foo/bar/' is equivalent to GNU -i 's/foo/bar/.
– paulmelnikow
Feb 18 '14 at 22:03
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How can I generate Unix timestamps?
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BSD date supports also +%s. Probably universal, as date is normally defined in POSIX.2.
– Dereckson
Nov 5 '17 at 15:41
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Shell script “for” loop syntax
... @Flow: Hm, I just tried it on a couple of systems (Linux and BSD based) with #!/bin/sh and it worked fine. Invoked under bash and specifically under /bin/sh, still worked. Maybe the version of sh matters? Are you on some old Unix?
– system PAUSE
M...