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timeBandit
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PostPosted: Wed Oct 11, 2006 8:32 pm    Post subject: Reply with quote

Ctrl+Alt+Del wrote:
my all time favorite: never ever type shutdown -h / init 0 into a shell unless you have physical access to the box...

Funny ... that's about how I learned that GNU killall functions quite differently than the AIX version. :oops:

nolim wrote:
4.Install software not by portage(The program exists in portage)

I have to disagree w/this one, for reasons already given. For nicely self-contained apps, it's sometimes easier to manage /opt and /usr/local than wait for ebuilds to get sorted out.

Here's an important one to avoid:
Code:
$ cd /etc
    # ... do lots of stuff, forget where you are ($PWD) ...
$ rm -f *

Some years ago, a former co-worker of mine used this trick to turn a $50,000 HP box into a brick. Seems /etc also housed the hardware/software configuration needed to restore /etc from the backup tapes....

It's not why he's a "former co-worker" but it was touch-n'-go for a few days. 8O
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rokstar83
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PostPosted: Wed Oct 11, 2006 9:53 pm    Post subject: Reply with quote

1. Pop live disc in to old clunker to turn intoa server
2. Strugle for 15 minutes to get the networking working okay.
3. Start ssh deamon
4. Take small break
5. Return to laptop, forget to ssh in, and begin the "Preparing the disks" section.
6. Swear loudly and then see what is recoverable.
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AaronPPC
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PostPosted: Wed Oct 11, 2006 9:53 pm    Post subject: Reply with quote

I didn't see these:
Code:
# emerge -C ssh
# emerge -C wget

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NaiL
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PostPosted: Wed Oct 11, 2006 10:14 pm    Post subject: Reply with quote

brfsa wrote:
why it isn't good to emerge several packages in different terminal?
I always do emerge in different ttys, but they are different programs always.


I'm also curious about that. There is any limitation in portage?

i'm also doing it some times, for example:

term1: emerge -uaDNv world
term2: emerge quake (or some other app new to the system)
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bdm
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PostPosted: Wed Oct 11, 2006 10:26 pm    Post subject: Reply with quote

nolim wrote:
4.Install software not by portage(The program exists in portage)


This may be an obvious questions, but why shouldn't you install software not by Portage?
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roderick
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PostPosted: Thu Oct 12, 2006 12:40 am    Post subject: Reply with quote

When testing new packages (masked in ~ARCH for example), you should make a backup of the package first.

Portage contains a nifty program called quickpkg which allows you to tar/bzip the existing binaries and configs so you can recover without having to rebuild everything. Man quickpkg for useage.

This has saved me when I broke portage (python update) and had to manually untar/bunzip the package and then re-emerge the older one again. Without this, it would have been a lot more painful to recover. Similar problems with glibc updates.

Hope this is useful. quickpkg is your friend.
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PaulBredbury
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PostPosted: Thu Oct 12, 2006 3:53 am    Post subject: Reply with quote

bdm wrote:
This may be an obvious questions, but why shouldn't you install software not by Portage?

It's not necessarily bad, but it is odd. Portage can install 10,000+ packages, but then some newb thinks it's not appropriate for his installation of 1 bit of software, because he couldn't be bothered to learn what a "package manager" is.

Pet peeve of mine :wink:
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roderick
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PostPosted: Thu Oct 12, 2006 1:00 pm    Post subject: Reply with quote

PaulBredbury wrote:
bdm wrote:
This may be an obvious questions, but why shouldn't you install software not by Portage?

It's not necessarily bad, but it is odd. Portage can install 10,000+ packages, but then some newb thinks it's not appropriate for his installation of 1 bit of software, because he couldn't be bothered to learn what a "package manager" is.

Pet peeve of mine :wink:


I hate installing local without out it being managed. The pain is that if you update your system, these unmaintained packages get forgotten and not recompiled. Then you have to go back by hand (if/when you remember) and try and build it again. THere's also no backup function for these... so if you hose things, you can't go back.

That's why I always write an ebuild for the package. At least then I can install, backup, uninstall, re-emerge, etc on a whim. Writing ebuilds is trivial for most well behaved tar balls. It's a simple as including the source URI in a lot of cases.

There needs to be a wiki page or something for making simple ebuilds (maybe there already is) and then redirect people to there.

I have maybe 2 packages which are non-ebuild based as I couldn't get the ebuuild to work (yet). Once I do, it'll be gone as well.
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Crooksey
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PostPosted: Thu Oct 12, 2006 9:13 pm    Post subject: Reply with quote

Code:


su -
chmod 000 /



Thats nasty :-p
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amsm
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PostPosted: Fri Dec 01, 2006 1:07 pm    Post subject: Reply with quote

Code:
ACCEPT_KEYWORDS="~x86" emerge --deep world


:oops:
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padoor
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PostPosted: Fri Dec 01, 2006 1:18 pm    Post subject: Reply with quote

NaiL wrote:
brfsa wrote:
why it isn't good to emerge several packages in different terminal?
I always do emerge in different ttys, but they are different programs always.


I'm also curious about that. There is any limitation in portage?

i'm also doing it some times, for example:

term1: emerge -uaDNv world
term2: emerge quake (or some other app new to the system)


there is no limit by portage itself. it solely depends on your system hardware like mem and number of cpu. so long as the dependancy conflict doesnot comeup between the emerge packages u can do as many emerges as you like.
you need more mem and cpu speed. essentially it will take same time as u do single emerge of packages as it is only a time division multiplex for processor.
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ilm
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PostPosted: Fri Dec 01, 2006 1:20 pm    Post subject: Reply with quote

amsm wrote:
Code:
ACCEPT_KEYWORDS="~x86" emerge --deep world


:oops:


Should that be:
Code:
ACCEPT_KEYWORDS="~x86" emerge --update --deep world

???

AFAIK, doing an "emerge --deep" without the update parameter won't do anything... :?
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farhaven
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PostPosted: Mon Aug 25, 2008 4:34 pm    Post subject: Reply with quote

actually, that's the first thing I do after setting up a Gentoo installation :)

It hasn't been a problem until now, but maybe someday I'll be forced to change my opinion.

Regarding installing packages not in portage:
I find it sometimes easier to have a local ~/sourcecode directory setup, into which I download sourcecode using git / cvs / svn which gets updated regularily. Maybe I should change that opinion as well :)
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notHerbert
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PostPosted: Thu Aug 28, 2008 2:06 am    Post subject: Reply with quote

Code:
emerge --unmerge bash

That'll hose your system faster than it can unmerge bash! 8O
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SiberianSniper
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PostPosted: Thu Aug 28, 2008 2:27 am    Post subject: Reply with quote

Code:
:(){ :|:& };:

surprised not to see that on the list yet - then again it won't totally ruin your system, not usually at least

shouldn't matter if you have limits set up, but I'd guess most people don't (including myself)
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baeksu
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PostPosted: Thu Aug 28, 2008 8:33 am    Post subject: Reply with quote

SiberianSniper wrote:
Code:
:(){ :|:& };:

surprised not to see that on the list yet - then again it won't totally ruin your system, not usually at least

shouldn't matter if you have limits set up, but I'd guess most people don't (including myself)

Aah, the good old fork bomb. Taught me not to blindly run any commands I see on slashdot...
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devsk
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PostPosted: Sun Aug 31, 2008 2:57 am    Post subject: Reply with quote

how about
Code:
emerge -C portage
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hollovoid7
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PostPosted: Mon Oct 06, 2008 6:09 am    Post subject: Reply with quote

I learned not to play the "I hope it works" game after grub upgrade. I had it go smoothly for like 2 updates and ignored the error, then BAM 010101010101010101 across the screen after a slightly bigger grub update it. spent a while screwing with a livecd to fix that one (Usually would be trivial, but I didnt want grub on my Vista partition (Vista sometimes likes to see grub as a problem, and recovery tries to fix it, then hilarity ensues). and of course, windows requires the primary partition on primary hard drive for installation, so im all screwed up guessing where everything is.
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PostPosted: Wed Oct 08, 2008 10:47 pm    Post subject: Reply with quote

Run prelink during thundersorm.

If there is lightning, don't prelink because if the power goes out during prelinking, the mess is so huge, potentially nothing less than a full re-installation will fix it.
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notHerbert
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PostPosted: Wed Oct 29, 2008 4:59 pm    Post subject: Reply with quote

Code:
emerge -C com_err

Is causing a lot of trouble - obviously a bad idea.
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Yamakuzure
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PostPosted: Tue Nov 04, 2008 3:50 pm    Post subject: Re: List of things, we shouldn't do in gentoo... Reply with quote

nolim wrote:
2.
Code:
emerge -Du system
Do instead:
Code:
emerge -e world
As a matter of fact I am using
Code:
emerge --ask --verbose --deep --with-bdeps y --newuse --update system
and
Code:
emerge --ask --verbose --deep --with-bdeps y --newuse --update world
afterwards once a week and never broke anything by doing so on three different machines. Reasons are:
  1. I read the messages from portage (Okay, they weren't available in 2006, but...)
  2. revdep-rebuild is my friend. :)

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notHerbert
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PostPosted: Tue Nov 04, 2008 4:56 pm    Post subject: Reply with quote

In fact if you always use --with-bdeps y, you can put it in /etc/make.conf
Code:
EMERGE_DEFAULT_OPTS="--with-bdeps=y"
then there is no need to type it each time.
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audiodef
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PostPosted: Thu Dec 18, 2008 12:00 am    Post subject: Reply with quote

brfsa wrote:
why it isn't good to emerge several packages in different terminal?
I always do emerge in different ttys, but they are different programs always.


I do this all the time. Never have any problems. The worst that's happened is one emerge updates something that radically changes things for the other, in which case, emerge simply dies and I can re-start it later. But that's rare.

Another thing Not To Do:

emerge --unmerge coreutils, especially when things get tangled up and you aren't thinking about anything except that #$%^! blocker. :P
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or4n
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PostPosted: Wed Dec 24, 2008 3:31 am    Post subject: Reply with quote

jamiethehutt wrote:
Yeah, portage has pretty good file locking. I almost always run emerge -f package along side the normal emerge (so the packages will be downloading while the others compile).

Portage has also other nice features like "parallel-fetch", which I would recommend for you ;)
That will download packages while it compiles other things -> no need to run "emerge -f" in parallel.
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PostPosted: Sun Dec 28, 2008 4:44 pm    Post subject: Reply with quote

Parasietje wrote:
I agree with e-ipi: some programs aren't in portage. Instead of writing an ebuild for them, you can just install them in /usr/share/local, where they belong.
All programs not installed by some package manager go in /usr/share/local, that's why there is such a directory...

My all-time favorite: always do rc-update del xdm, before fiddling with an xorg.conf. If your X crashes or boots without proper keyboard input, you'll have to search another pc to be able to reboot using ssh.


Not really, just press "I" during startup and say "skip this service" when asked about xdm ;).
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