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Apache Prefork vs Worker MPM
...LE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=256
-D HTTPD_ROOT="/etc/httpd"
-D SUEXEC_BIN="/usr/sbin/suexec"
-D DEFAULT_PIDLOG="/run/httpd/httpd.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_ERRORLOG="logs/er...
Delete all but the most recent X files in bash
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ls -t | awk 'NR>5' | xargs rm -f if you prefer pipes and you need to suppress the error if there is nothing to be deleted.
– H2ONaCl
Jul 30 '14 at 7:58
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How to output only captured groups with sed?
Is there any way to tell sed to output only captured groups? For example given the input:
8 Answers
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Query EC2 tags from within instance
...e | cut -f5
And to get only the value for the tag that I filtered on, we pipe to cut and get the fifth field.
ec2-describe-tags \
--region \
$(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone | sed -e "s/.$//") \
--filter \
resource-id=$(curl --silent http:...
How do I get cURL to not show the progress bar?
...om > temp.html
This works for both redirected output > /some/file, piped output | less and outputting directly to the terminal for me.
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How to define hash tables in Bash?
...mporary file, one-per line, then use 'grep "^$key"' to get them out, using pipes with cut or awk or sed or whatever to retrieve the values.
Like I said, it sounds terrible, and it sounds like it ought to be slow and do all sorts of unnecessary IO, but in practice it is very fast (disk cache is awes...
Function return value in PowerShell
...$a
return
The $a variable in the second example is left as output on the pipeline and, as mentioned, all output is returned. In fact, in the second example you could omit the return entirely and you would get the same behavior (the return would be implied as the function naturally completes and ex...
VIM + JSLint?
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Much better is to pipe the results through Lynx to deal with JSLint's unfortunate choice of HTML for output format. I have a blog post on how to do it here:
http://www.fleegix.org/articles/2008-09-06-jslint-in-vim-through-lynx
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How to split a dos path into its components in Python
...g the data back from the other program? Are you reading it from a file, a pipe, a socket? If so, then you don't need to do anything fancy; the only reason for doubling backslashes or using raw strings is to place string constants into Python code. On the other hand, if the other program is genera...
How to use SSH to run a local shell script on a remote machine?
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Not certain but can't you pipe your script on hostA to run on hostB using this method?
– nevets1219
Apr 28 '10 at 21:13
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