l0b0

5,684 reputation

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bio	website	l0b0.wordpress.com
	location	Zurich, Switzerland
	age	33
visits	member for	2 years, 4 months
	seen	yesterday
stats	profile views	296

Developer - Hobby & work

	5,684 reputation	bio	website	l0b0.wordpress.com	visits	member for	2 years, 4 months
636 badges		location	Zurich, Switzerland		seen	yesterday

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2d	comment	Easy way to parse syslog date format One-liner replacing the date: `sudo perl -n -e 'use DateTime::Format::Strptime; my $parser = DateTime::Format::Strptime->new( pattern => "%B %d %Y"); m/^(\w+ \d+ )(.*)/; print ($parser->parse_datetime("$1" . DateTime->now->year)->ymd, " ", $2, "\n");' /var/log/syslog`
2d	comment	Easy way to parse syslog date format Zero padding didn't work here.
2d	comment	Easy way to parse syslog date format Don't you want `may` in there? ;)
2d	revised	Is grandchild process also child process? added 7 characters in body
May 22	comment	How to get name of Display Manager on Linux? You can try [`xwininfo -id $(xprop -root \| awk '/_NET_ACTIVE_WINDOW$WINDOW$/{print $NF}')`][1] for the current window. [1]: askubuntu.com/a/20534/10371
May 22	revised	Is grandchild process also child process? added 63 characters in body
May 22	revised	Is grandchild process also child process? added 453 characters in body
May 22	answered	Is grandchild process also child process?
May 22	comment	TAB autocomplete on sudo sh Please clarify whether you mean after you typed `sudo sh` and pressed TAB, or executed `sudo sh` and pressed TAB (`sh` may not load autocomplete configuration when starting).
May 19	revised	Number of files containing a given string added 1 characters in body
May 16	comment	What is the difference between “sort -u” and “sort \| uniq”? +0.49 for a useful answer, but I would phrase it something like "The output of `sort -u` can't be passed to `uniq` to use some of the latter's useful options, such as skipping fields for comparison and counting the number of repetitions."
May 16	revised	What is the difference between “sort -u” and “sort \| uniq”? There's no `-uniq` option with a single dash
May 16	comment	POSIX head and tail not feature equivalent @cjm I forgot about non-`seek`able streams :) I still can't believe excluding the last N lines is much more rare than excluding the first N lines. I'd upvote your answer if it wasn't for the first paragraph and the caveat about `seek`able streams.
May 15	comment	POSIX head and tail not feature equivalent I highly doubt any implementation of `head` or `tail` actually stores the lines; it would simply have to store the position in the file. As you say, starting from EOF, look backwards to find the Nth newline. Record the position and print the entire file until that position. Not exactly resource intensive: `time head -n +10 [88 MB file on a harddisk]` reports 0.002s. And who's to say whether a feature is "worth implementing?"
May 15	revised	POSIX head and tail not feature equivalent added 47 characters in body
May 15	asked	POSIX head and tail not feature equivalent
May 15	comment	How to obtain inverse behavior for `tail` and `head`? `head -n -2` is not POSIX compatible.
May 15	comment	Is there a general command to see what shell is running? @jillagre Strange, the standard allows (and mentions) both syntaxes. So `-n -1` and `-n 1` are equivalent, while `-n +1` is not. Bizarre.
May 15	revised	How to monitor the last PID assigned by the kernel? edited tags
May 15	comment	Possible sftp connection behind a router that is impossible to open any public ports except some standart ports like http? Any specific reason to use `sftp` instead of `scp` or `rsync`? Also, please clarify the sentences - it's difficult to read now.