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How to duplicate sys.stdout to a log file?
...no(), 'w', 0)
tee = subprocess.Popen(["tee", "log.txt"], stdin=subprocess.PIPE)
os.dup2(tee.stdin.fileno(), sys.stdout.fileno())
os.dup2(tee.stdin.fileno(), sys.stderr.fileno())
print "\nstdout"
print >>sys.stderr, "stderr"
os.spawnve("P_WAIT", "/bin/ls", ["/bin/ls"], {})
os.execve("/bin/ls"...
Hidden features of Perl?
...'t figure out how it works. At what point is zcat | parsed as a command to pipe through?
– Ether
Jun 3 '10 at 3:44
1
...
erb, haml or slim: which one do you suggest? And why? [closed]
...
+1. But the pipe isn't needed for text on the same line as the tag. It's only needed if the first line of text inside a tag isn't on the same line as the tag. Every line after the first doesn't need the pipe, because of indentation.
...
How can I write a heredoc to a file in Bash script?
...> /tmp/yourfilehere
The variable $FOO will not be interpreted.
EOF
To pipe the heredoc through a command pipeline:
cat <<'EOF' | sed 's/a/b/'
foo
bar
baz
EOF
Output:
foo
bbr
bbz
... or to write the the heredoc to a file using sudo:
cat <<'EOF' | sed 's/a/b/' | sudo tee /etc...
Environment variables in Mac OS X
... is the root process. To apply changes to the running root launchd you can pipe the commands into sudo launchctl.
The fundamental things to understand are:
environment variables are inherited by a process's children at the time they are forked.
the root process is a launchd instance, and there i...
程序员：编程能力与编程年龄的关系 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...超级有想和他们争论的冲动，但后来想想算了，因为 你无法帮助那些只想呆在井底思维封闭而且想走捷径速成的人。
今天，我们又来谈这个老话题，因为我看到一篇论文，但是也一定会有很多人都会找出各种理由来论证这篇论...
Git diff to show only lines that have been modified
...
+Y
-G
+Z
Like I said above, though, this is just for most cases. If you pipe that output to a file dout, then try the same regex, it won't work.
$ git diff dout | grep '^[+|-][^+|-]'
$
Anyways, hope that helps in your case
...
Is it possible to perform a 'grep search' in all the branches of a Git project?
...EAD aliasing notation.
I solved it by adding a sed '/->/d' in the pipe, between the tr and the xargs commands.
git branch -a | tr -d \* | sed '/->/d' | xargs git grep <regexp>
That is:
alias grep_all="git branch -a | tr -d \* | sed '/->/d' | xargs git grep"
grep_all <r...
使用TokuMX配置Replica Set集群 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...解，其采用了MMAP的方式来操作数据文件，这就导致我们无法限制MongoDB进程所使用的内存容量，目前最好的部署办法就只能是将其单独部 署在一台服务器上。另外，MongoDB也不能严格的支持事务，对于并发写入的锁的粒度也非常...
How to know what the 'errno' means?
... File too large
28 ENOSPC No space left on device
29 ESPIPE Illegal seek
30 EROFS Read-only file system
31 EMLINK Too many links
32 EPIPE Broken pipe
33 EDOM Numerical argument out of domain
34 ERANGE ...