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通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...序都不会受其影响：
Shell 进程 1
ulimit – s 100
cat testFile > newFile
File size limit exceeded
Shell 进程 2
cat testFile > newFile
ls – s newFile
323669 newFile
那么，是否有针对某个具体用户的资源加以限制的方法呢？答...
What does 'predicate' mean in the context of computer science? [duplicate]
...cifically I've seen it used in the context of text filtering. As if "predicate" == "filter criteria".
7 Answers
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How can I read command line parameters from an R script?
...d Apr 27 '15 at 13:10
The Unfun Cat
20.5k2222 gold badges8686 silver badges114114 bronze badges
answered Jan 28 '10 at 12:52
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How can I plot separate Pandas DataFrames as subplots?
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You may not need to use Pandas at all. Here's a matplotlib plot of cat frequencies:
x = np.linspace(0, 2*np.pi, 400)
y = np.sin(x**2)
f, axes = plt.subplots(2, 1)
for c, i in enumerate(axes):
axes[c].plot(x, y)
axes[c].set_title('cats')
plt.tight_layout()
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Run cron job only if it isn't already running
...;& (ps -u $(whoami) -opid= |
grep -P "^\s*$(cat ${PIDFILE})$" &> /dev/null); then
echo "Already running."
exit 99
fi
/path/to/myprogram > $HOME/tmp/myprogram.log &
echo $! > "${PIDFILE}"
chmod 644 "${PIDFILE}"
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Make xargs handle filenames that contain spaces
... +1 + 1 trick for using with file paths containing list files : cat $file_paths_list_file | perl -ne 's|\n|\000|g;print'| xargs -0 zip $zip_package
– Yordan Georgiev
Jun 24 '14 at 13:47
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Catching error codes in a shell pipe
...mp is present on antique HP-UX. I'm not sure whether there's a common invocation of mktemp that works across platforms. POSIX standardizes neither mktemp nor tmpfile. I didn't find tmpfile on the platforms I have access to. Consequently, I won't be able to use the commands in portable shell scripts...
How to find out how many lines of code there are in an Xcode project?
....pl file using 'chmod u+x cloc-1.56.pl' command. If your source code is located in directory 'project_code' You just need to run following command.
– JZ.
Sep 26 '14 at 3:41
a...
How to copy file from HDFS to the local file system
...w to copy file from HDFS to the local file system . There is no physical location of a file under the file , not even directory . how can i moved them to my local for further validations.i am tried through winscp .
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sed or awk: delete n lines following a pattern
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This might work for you:
cat <<! >pattern_number.txt
> 5 3
> 10 1
> 15 5
> !
sed 's|\(\S*\) \(\S*\)|/\1/,+\2{//!d}|' pattern_number.txt |
sed -f - <(seq 21)
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