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How can I find out the total physical memory (RAM) of my linux box suitable to be parsed by a shell
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awk '/MemTotal/ {print $2}' /proc/meminfo The fewer pipes the better.
– masta
Jun 26 '15 at 20:30
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Get environment variable value in Dockerfile
I'm building a container for a ruby app. My app's configuration is contained within environment variables (loaded inside the app with dotenv ).
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pdftk compression option
... in a single one using redirection from & to standard input/output and pipes:
pdf2ps large.pdf - | ps2pdf - small.pdf
did reduce a PDF generated by xsane from 18 Mo to 630 ko!
Links are lost, but for the present example, it's not a concern... and was the easiest way to achieve the desired res...
Linux的诞生和发展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。
0.02 (1991.10.5)该版本以及0.03 版是内部版本，目前已经无法找到。
0.03 (1991.10.5)
0.10 (1991.10)由Ted Ts'o 发布的Linux 内核版本。
0.11 (1991.12.8)基本可以正常运行的内核版本。
0.12 (1992.1.15)主要加入对数学协处理器的软件模拟程序。...
Changing default encoding of Python?
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If you get this error when you try to pipe/redirect output of your script
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-5: ordinal not in range(128)
Just export PYTHONIOENCODING in console and then run your code.
export PYTHONIOENCODI...
How do you search an amazon s3 bucket?
I have a bucket with thousands of files in it. How can I search the bucket? Is there a tool you can recommend?
21 Answers
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What is RPC framework and Apache Thrift?
...tionally, you have some flexibility regarding transports (such as sockets, pipes, etc) and protocols (binary, JSON, even compressed), plus some more options like SSL or SASL support.
For example, you may set up a server on a Linux machine, written in C++ which offers some service to the world thro...
Cron and virtualenv
I am trying to run a Django management command from cron. I am using virtualenv to keep my project sandboxed.
9 Answers
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Fixing the order of facets in ggplot
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Here's a solution that keeps things within a dplyr pipe chain. You sort the data in advance, and then using mutate_at to convert to a factor. I've modified the data slightly to show how this solution can be applied generally, given data that can be sensibly sorted:
# the da...
Get the current git hash in a Python script
...nv['LC_ALL'] = 'C'
out = subprocess.Popen(cmd, stdout = subprocess.PIPE, env=env).communicate()[0]
return out
try:
out = _minimal_ext_cmd(['git', 'rev-parse', 'HEAD'])
GIT_REVISION = out.strip().decode('ascii')
except OSError:
GIT_REVISION = "Unknown"...