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How to get Linux console window width in Python
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tput is better than stty, as stty cannot work with PIPE.
– liuyang1
Jul 14 '15 at 12:35
5
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jQuery.ajax handling continue responses: “success:” vs “.done”?
...re (much cooler) things you can do with $.Deferred, one of which is to use pipe to trigger a failure on an error reported by the server, even when the $.ajax request itself succeeds. For example:
function xhr_get(url) {
return $.ajax({
url: url,
type: 'get',
dataType: 'json'
})
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How to pipe input to a Bash while loop and preserve variables after loop ends
... do not themselves create a subshell. In this context, they are part of a pipeline and are therefore run as a subshell, but it is because of the |, not the { ... }. You mention this in the question. AFAIK, you can do a return from within these inside a function.
Bash also provides the shopt buil...
How does the vim “write with sudo” trick work?
...tee.
Understanding tee
As for tee, picture the tee command as a T-shaped pipe in a normal bash piping situation: it directs output to specified file(s) and also sends it to standard output, which can be captured by the next piped command.
For example, in ps -ax | tee processes.txt | grep 'foo', ...
Running Bash commands in Python
...bprocess
process = subprocess.Popen(bashCommand.split(), stdout=subprocess.PIPE)
output, error = process.communicate()
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Bash variable scope
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The problem is that processes put together with a pipe are executed in subshells (and therefore have their own environment). Whatever happens within the while does not affect anything outside of the pipe.
Your specific example can be solved by rewriting the pipe to
while ....
驯服Linux OOM Killer（优质英文资料翻译） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...会使用它们分配的所有内存。如果没有过量使用，系统将无法充分利用其内存，从而浪费一些内存。过量使用内存允许系统以更有效的方式使用内存，但存在 OOM 情况的风险。内存占用程序会耗尽系统的内存，使整个系统陷入停...
驯服Linux OOM Killer（优质英文资料翻译） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...会使用它们分配的所有内存。如果没有过量使用，系统将无法充分利用其内存，从而浪费一些内存。过量使用内存允许系统以更有效的方式使用内存，但存在 OOM 情况的风险。内存占用程序会耗尽系统的内存，使整个系统陷入停...
驯服Linux OOM Killer（优质英文资料翻译） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...会使用它们分配的所有内存。如果没有过量使用，系统将无法充分利用其内存，从而浪费一些内存。过量使用内存允许系统以更有效的方式使用内存，但存在 OOM 情况的风险。内存占用程序会耗尽系统的内存，使整个系统陷入停...
驯服Linux OOM Killer（优质英文资料翻译） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...会使用它们分配的所有内存。如果没有过量使用，系统将无法充分利用其内存，从而浪费一些内存。过量使用内存允许系统以更有效的方式使用内存，但存在 OOM 情况的风险。内存占用程序会耗尽系统的内存，使整个系统陷入停...