Forgetting Sudo (we've all done it)
October 26th, 2009 by Shawn Powers in
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__________________________
Shawn Powers is an Associate Editor for Linux Journal. You might find him chatting on the IRC channel, or Twitter
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December 2009, #188
If last month's Infrastrucuture issue was too "big" for you then try on this month's Embedded issue. Find out how to use Player for programming mobile robots, build a humidity controller for your root cellar, find out how to reduce the boot time of your embedded system, and if you're new to embedded systems find out the basics that go into one. You can also read about the Beagle Board, the Mesh Potato and a spate of other interestingly named items. And along with our regular columns don't miss our new monthly column: Economy Size Geek.
If you want to append the
On October 31st, 2009 joni (not verified) says:
If you want to append the last element from the previous line, rather than the whole thing, press "Alt" together with "."
Very useful for executing different commands on the same file.
(there are key combinations for getting the different fields, not just the last one, but can't remember at the moment)
cat .bashrc cat !$
On October 27th, 2009 LinuxAddict7 (not verified) says:
cat .bashrc
cat !$
csh
On October 27th, 2009 Stephen (not verified) says:
This is one of the great things bash took from C-Shell, and there is far more to it than just !!. Although sudo !! must be my most-typed command, I also like: ^string1^string2^
And don't forget about the word modifiers (e.g. !!:n retrieves word n of the last command)
I loved it ..
On October 27th, 2009 k.sangeeth says:
will teach it to my team-mates tomorrow ;)
I'm waiting to see the look on their faces :D
this worked on bash .. any idea on what the ksh alternative is??
__________________________Sangeeth Keeriyadath
www.sangeek.com
Stuff like this....
On October 27th, 2009 JimmyTheGeek says:
...is completely awesome! You shouldn't post it so openly, though....Windows will now copy it all and call it innovation! :)
But wait, there's more!
On October 27th, 2009 mattcen says:
Must make a note that Twitter is the best way to contact Shawn :P; I suggested this tip in the IRC channel on September 14th, half-an-hour before you signed in, and also sent an email to webeditor at linuxjournal. Is that the correct address for tech-tip suggestions?
Anyway, I also suggested a little bit extra: If you use !$ instead of !!, it will *only* expand to the *arguments* of the last command. For example (extract from the email I sent):
$ ls /usr/share/doc
Now to change into it:
$ cd !$
This will *replace* 'ls' with 'cd', i.e. take all the *arguments* to the last command and use them as arguments to the new command. Ultimately, it will expand to 'cd /usr/share/doc'.
not quite
On October 27th, 2009 Stephen (not verified) says:
$ refers not to all arguments, but to the last word only. For all arguments you might use * or ^-$ (both of these resolve to word 1 to the last word with the command line words numbered 0 - n)
touch one two three
ls !$
ls !-2:*
rm !!:^-$
My bad
On October 27th, 2009 mattcen says:
Ah yes, I think I remember seeing that somewhere now. Thanks for the clarification Stephen :-)! It's amazing how much power the shell has! I finally found all that information in the Bash manual page, under "Event Designators" in the "HISTORY EXPANSION" section.
Ha!
On October 27th, 2009 Shawn Powers says:
Sorry about that -- yeah, twitter, or email directly to me is the best way. :)
__________________________Shawn Powers is an Associate Editor for Linux Journal. You might find him chatting on the IRC channel, or Twitter
O_O I think you have just
On October 26th, 2009 Anonymous (not verified) says:
O_O I think you have just changed my life forever.
Copyrighted intro
On October 26th, 2009 Kurt Kraut (not verified) says:
If this intro with a zooming globe came from Google Earth, it is copyrighted material and I don't think it could be distributed in a intro as it is. Please, check you Google Earth license.
Further Reading...
On October 26th, 2009 Shawn Powers says:
Apparently using video exported from Google Earth Pro is allowed for web videos. I'm not sure if the video submitted was captured with GEP -- but like I said before, if asked, we'll happily take the video down.
Thanks again. :)
__________________________Shawn Powers is an Associate Editor for Linux Journal. You might find him chatting on the IRC channel, or Twitter
IANAL
On October 26th, 2009 Shawn Powers says:
I think as long as we don't sell it, we're fine. I think perhaps it's missing the Google attribution, but apart from that it appears we can use it... If Google asks us to take it down, we certainly will. :)
Thanks for the heads up!
__________________________Shawn Powers is an Associate Editor for Linux Journal. You might find him chatting on the IRC channel, or Twitter
Google
On October 27th, 2009 Toby Richards (not verified) says:
It was taken from a Google Earth Pro evaluation. Sorry about that. I spent so much time finding music in the public domain (National Emblem played by the USMC Band), that I completely didn't think about the Google issue.
Also works the other way appending a command
On October 26th, 2009 Verlaine (not verified) says:
For example
~:$ ls /some/directory
Followed by
~:$ !! | grep myfile
Will execute
~:$ ls /some/directory | grep myfile
I don't get it.
On October 26th, 2009 cmnorton says:
Shawn: I usually get the tech-tips. This was waltzed right past me. Does struggling with mailman all day count as a senior moment?
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