I'm currently running Fedora 15 and recently I've noticed that if I am in an area which does not have a wireless network or a secured wireless network which I cannot automatically connect to, Fedora 15 boots up very slowly, sometimes hanging on the screen with the Fedora logo. Is there a way to f...
In bash, is there a way to know if a given script has been invoked with:
myscript.sh myfile
or
myscript.sh < myfile
?
Inside some scripts I always have accessed the contents of myfile with $1, but now I'd like to change the behavior as different cases.
EDIT: I also would like a...
I recently noticed a couple of questions tagged architecture that don't make any sense to me. I clicked through to make sure I knew what the architecture tag was supposed to be and discovered a hodge-podge of stuff. It looks like it was originally created with the processor architecture in mind, ...
I usually edit in vim,and when pressing + , I'd rather move my hand to the right part of the keyboard where + resides rather than doing shift + =.
But when num lock is not on,in vim it just opens a new line above and inserts the letter k .And every time I start my PC num lock is off.
I would like...
In one of my bash scripts I needed to obtain the last part of a colon delimited string. For example I needed to grab the numeric 289283 value from the following value:
OK: DriveC-ReadBytesPerSec: 289283
After some trial and error I arrived at the following:
READRESULT="OK: DriveC-ReadBytesPer...
If I start an app with this command:
/path/to/my/command >> /var/log/command.log
And the command doesn't return, is there a way, from another prompt, to see what the STDOUT redirect is set to?
I'm looking for something like either
cat /proc/PID/redirects
or
ps -??? | grep PID
but ...
I am a php programmer and i just wanted to learn linux shell scripting now.. i would like to know few things from the experts over here before starting.
will this learning add any value to
my resume so that i can get a job in mnc.
If yes which linux should i prefer
to use and start learning...
@UnixandLinux See my comment, but I think the main answer to that question is about his resume and what general direction he should head as a programmer. Can we migrate it there? There is a bit about what distro to use, but since every distro can be used for shell scripting and none of the deciding qualifications are listed, I felt like that would be better asked in a different question entirely in which he can expand on the needs for that.
I'm attempting to clean out a bunch of temporary files from a folder tree, but don't want to delete files that match some criteria, specifically executable files or .tpl files.
I see the question here
Delete files in a directory that match a regexp, using a Mac terminal
is almost what I'm look...
I have many old (data) CDs.
I want to copy them all to the disk, but the problem is that some of these CDs are no longer readable and it is extremely tiresome to copy the CDs one by one.
Is there some tool to expedite this process?
I've implemented an Open LDAP server in OpenSuSE 11.2 via the YaST GUI. I'm having success logging in from the local machine and other machines via LDAP. I am able to change LDAP user passwords via
passwd
on the command line. However, I cannot do anything else through the command line, suc...
I'm looking for a tool that will test my internet connection bandwidth and create an simple report... like speedtest do...
Do you know some program/tool that do this... if possible that run on CentOS.
On my Debian server, I upgraded the SQLite package to version 3.7.7 but discovered that it contains a critical bug that breaks several things including my Subversion repository. So, I would like to downgrade back to the previous version I was using. But:
I have no idea what that version was (I...
I've been using the GNU units program and I seem to think that I should be able to convert water between a volume and a weight.
Examples:
You have: 1 gram water
You want: cm^3
conformability error
1 gram water = 9.80665 kg^2 / m^2 s^2
cm^3 = 1e-06 m^3
and
You have: 1 gallon water
You...
cd serves dual use for the cd (change directory) command and CD as in CD-ROM/R/RW/audio. The tag isn't huge, but I'd still prefer to distinguish between them before it grows. I don't know how to name the two tags in such a way that people who feel tempted to use cd and don't realize there's an am...
I have many old (data) CDs.
I want to copy them all to the disk, but the problem is that some of these CDs are no longer readable and it is extremely tiresome to copy the CDs one by one.
Is there some tool to expedite this process?
@Gilles How well do dvd issues fit into that? Are there posts that would specifically need something dvd oriented or are data formatted optical media issues pretty much all the same thing?
@MichaelMrozek No, not at the moment. It's lumped under cd, and data-cd just got instantiated today. I have no problems with having a cdrom tag except that I think the majority of issues are going to be dvd/cd neutral so I tend towards a generic tag with a cdrom alias. I like that cdrom will get seen when people start typing cd.
@MichaelMrozek maybe that CD-ROMs are so simple no one asks about them? It's mostly about recordable CDs, or about recordable DVDs, or about video DVDs, or about optical media in general.
I'm for having data-cd as the master tag for CD-ROM+CD-R+CD-RW and cdrom as an alias. That way if people start by typing cdr and pick an existing tag, they'll get the right tag.
@Tshepang It does seem to serve a function for the change-directory command, a lot of issues related to that come up and browsing them seems useful. What's not useful is when people tag cdrom stuff as cd, so having a cdrom tag or alias would fix that I think.
When I type a command e.g. cd /etc/ I get the following cd /etc$ -- if I press the backslash key again then I get the correct entry cd /etc/ -- I am using gnome but I get the same problem with KDE.
Does anyone know what may be causing this problem?
I am trying to figure out a decent way to copy what I have in a tmux buffer into my clipboard. I have tried a couple of different things like
bind-key p select-pane -t 2 \; split-window 'xsel -i -b' \; paste-buffer
which gets me fairly close, all I have to do is hit control-d after I do pref...
I took the cd tag off of several questions entirely that had more to do with finding/downloading ISO's than about the actual disks. Some of these had distribution-media already, I added it to the others.
@Gilles I don't think you can call up questions by the alias in a manual URL. That's how I discovered data-cd ended up as the alias.
@Gilles: Any comments on bandwidth, qos and tc? I started trying to fix a couple messy ones and realized I had no idea which direction it should be heading.
A lot of questions come up about qos in general and the answer is almost always tc related since tc is kind of the de-facto standard traffic shaper in the linux world, but that doesn't mean it is in all unixes.
Does it even make sense to have a tc? I started out assuming it did, but I'm not sure qos isn't sufficient.
@Caleb and what do they mean? e.g. they'd have tags that apply on Windows also, whereas we don't need that if the terminology is consistent across unices
Which it generally isn't when it comes to networking
I think pf handles it on *BSD. Sort of iptables and tc rolled into one.
I'm not sure how ipfw fits into that whole picture. Some say it doesn't support QoS but it has stuff about queues and queue rate limits ... basically it's not a world I know much about but the point is it isn't tc.
@Caleb I can't think of an ambiguity, and tc has a well-defined meaning, so let's keep it
@Gilles Super User has an ambiguous cd tag, a lonely cd-rw question, a lonely cd-ripping question, cd-rom, audiocd, cd-burning, and maybe one or two others. Ok, let's ignore them.
@Gilles Solaris doesn't seem to be a very good option for network traffic shaping. I'm finding references to various hacks, various people saying it's un-necessary, and others saying use Linux.
@Gilles That sounds like the general motif. Sometimes I get scared over there.
When I run sudo aptitude update from the console, I see output with lines such as this:
Get:1 http://security.ubuntu.com lucid-security Release.gpg [198B]
Ign http://security.ubuntu.com/ubuntu/ lucid-security/main Translation-en_GB
or this:
Hit http://security.ubuntu.com lucid-security Releas...
@Caleb I'm surprised he hasn't been banned anywhere (has he?). He does ask enough interesting questions, it's a pity he asks so many poor questions as well, and even the interesting ones are badly asked
@Gilles Actually I think he hit the "bad asker" limit where you don't get to ask questions on several other sites due to too many downvotes on his first question attempts. U&L seems to be where he has survived longest.
right now when I run man smth or similar less is used to view it. However, on Mac OS X, I really like scrolling with touchpad instead on up/down or page-up/page-down buttons. Is there a way to just print text into the terminal instead of using less or more?
@Caleb It's more than that. He's amassed quite a bit of rep, in fact. Most of which he puts in bounties. 1440 rep in 2 months (counting his previous account) from questions isn't so bad!
Beta Q&A site for feedback on projects you're working on, by sharing your code with fellow programmers and getting extensive feedback/review of best practices, design pattern usage, application UI, security, etc.
@Tshepang Mentioning "bottom of the first page" would make it much more clear, because it's not the "oldest" post either except by reference to the first page.
@Tshepang No, actually “last entry” makes sense, but it's ambiguous: I understood it to mean latest entry (i.e. last by time), but you meant last in reading order which is valid too
So over on Unix and Linux we were chatting about how to tag questions related to traffic shaping. We thought we would check ServerFault for reference, but that led me to wonder just what exactly is going on here.
Can somebody explain the differences between qos, traffic-shaping, and bandwidth-co...
Code Review has more traffic than Science Fiction and Fantasy, which was created a week earlier. Also a few more questions, that's because we've deleted a lot on SFF.
and CR has twice the visits of BCG, which is a lot older.
Wow, I'm surprised that Parenting isn't doing much better.
I installed Python 2.7 from source. A dependency of some packages is python. Is there a way I can prevent the install of a lesser version of Python, or let apt know it's already been fulfilled?
e.g. at work I have to use Outlook. There are plenty of mail clients for Linux, of course, but they aren't good at connecting with Exchange servers and coping with the strangely-formed HTML produced by my Outlook-using colleagues
@Gigili No, most will not. Some apps are cross-platform (meaning they run on more than one operating system) but most are not. There is a whole separate world of applications for linux.
@Gigili It's a valid motivation if you have things that are worth protecting and are willing to learn how a very different system works. If not, it might be too much sacrifice ... giving up the familiar and the "easy" for a gain isn't important to you.
This somehow turned into a giant entry, so I split it into a few sections; it starts discussing the launch procedure and ends with me rambling about how voting is good and why we should vote more :)
Area 51 metrics and launch process
The beta launch process was changed somewhat after the first ...
@Gigili I don't use it primarily because of security ... security measures could be taken on other systems too ... but because it gives me the freedom to do what I want with my computer.
@Gigili You should clarify whether you are talking about desktops or servers ... and how much you already know about securing Windows with how much you are willing to learn about another (very complex) world.
@Caleb @Gigili The flexibility is amazing. That one can choose a different desktop rocks. With Windows and Mac, you are pretty much restricted to just one environment. There's pros and cons regarding this of course.
@MichaelMrozek I was wondering if is that site that could not decide on a theme.
anyone remember that?
It got a theme, people didn't like it, and was reverted to a Beta theme.
@Caleb I've learned a little when we were working on our bachelor thesis, a project about writing compilers, but wasn't that easy , especially the command prompt and also I had problems with internet connection .. I fear if I remove all and then I blame myself "was security that important ?"
@Gigili I don't use Linux because it's more secure. It's a nice benefit but not my main motivation. I use Linux primarily because it's more user-friendly.
Right now both throttle and throttling exist, with the larger batch of questions tagged with the throttle. They seem to be be about the same general thing, and throttling seems like a better choice to refer to the concept by.
While that's being discussed, rate-limiting should probably be thrown ...
@Tshepang Great idea, there's no difference if I do a double-boot or complete installation? I mean something that doesn't work , like internet connection?
@Gilles A friend of mine told me that in linux I can change what I don't like .. I doubt if I would do such things, I learned to adopt!
@Gigili no there isn't much, other than that your VM install will be a little slower than a normal one. There won't be a problem with internet connection. The VM (VirtualBox) will think it's running on a LAN connection).
@Tshepang True enough, but remember he came here asking about security so you should qualify that a VM is only a solution for learning the ropes and seeing if he likes it, not for his initial concern of security.
@Gigili No. Dual-boot and "full install" are not actually different except that early in the boot process some bit of software makes a decision about which OS to start up. Whichever one you chose gets full access to all the hardware ... it IS a full install.
@Gilles We used to do dual-boot install sessions for people in univeristy. Ubuntu's default option used to be to use the whole disk, even if Windows was installed. No matter how much we emphasized paying attention when partitioning, people lost their Windows partitions every time
@MichaelMrozek My first exposure to Ubuntu was fixing friends machines that got chewed up in just that way. I don't think I've ever quite forgiven Ubuntu and it remains one of my less favorite distributions.
Gnome3 actually looks very promising, but it's lacking basic configuration options like key-bindings for now. When it matures I think it will actually be a pleasure ... sort of what Unity wanted to be but didn't spend enough time working out the kinks.
@Caleb I gave up on awesome after the fourth time a point release broke my configuration file. They couldn't have cared less about backwards compatibility
@Gilles As far as I'm concerned it's pure genius ... exactly what I would have written if I'd started from scratch. I came from sawfish where I loved the customizability but it wasn't maintained and I always kind of envied tiled managers and flirted with other interfaces for virtual desktops from fancy things like beryl. When I discovered awesome it was all over ... the mixed tiling/floating, 100% scriptability, tag interface instead of standard desktops ... it's just beautiful.
@MichaelMrozek Ouch, that's bad. My .emacs is still (in theory) compatible with 19.23. My .profile is still (in theory) good on SunOS 4, and my .zshrc on 2.5. I want the same for my wm.
@MichaelMrozek Lack of care for backwards compatability and rough documentation are valid complaints. I don't regret working through the lack of docs and I always test my configs in Xephr ... and havn't looked back.
The only reason I liked awesome was the bar had all the built-in widgets for icons and progress bars and graphs and all that, and I finally discovered dzen
@Gilles It's not it's strong point, but it handles it. I only use floating layouts for a few apps (like The GIMP) that refuse to play nice with tiling. I use tiling on even my smallest screens ... it seems the smaller the screen the more useful it gets...but the ability to show one or many "virtual desktops" at once is nice because you group things by tag, then pick which tag(s) to have up at a given time.
When I run the TOP command, a process shows 1208% cpu usage and the total CPU usr time is 81.7% with IRIX mode on. When I change to IRIX mode off, the process shows 99% cpu usage and the total user cpu time is 43%.
Any ideas what might be going on? These are VM machines.
@Tshepang I doubt it. Been there done that. Usually combined with an overhaul of key bindings, vim macros, etc ... but working on one's workspace can be a big deal when you have it all wired up fancy with your own scripts.
No, it really did take me about 8 hours to work out all the things that had changed. I would keep the old version installed in case I needed to restart X
I use wmii now, but it doesn't really matter, they're all kind of the same. The only thing that differentiated them was the status bars, and I just hide them now
Ok I've been officially out-geeked. My old sawfish configs are ~700 lines, my current awesome config is 408, and my vimrc (not counting ~10k lines of included plugins, sytax files etc) is a measly 292. (which either proves my incompetence or vims clear superiority)
I use both, although if I had to choose one, I know which one I would pick. Still, I'll try to make an objective comparison on a few issues.
Available everywhere? If you're a professional system administrator who works with Unix systems, you need to know vi (not Vim), because it's available on ...
When looking at comparisons, it seems to me that there could be a 1:1 mapping between their feature sets. Yet, an often cited statement is that "Mercurial is easier". What is the base of this statement? (if any)
@Tshepang The first answer is stupid. I admit I haven't read it fully, but: part 1 is about some extremely rare task being easier in hg; that's not an argument to pick one or the other. Part 2 is mostly a rant against git on Windows, where Windows's faults are blamed on git. Part 3 is part 2 again.
In bash, is there a way to know if a given script has been invoked with:
myscript.sh myfile
or
myscript.sh < myfile
?
Inside some scripts I always have accessed the contents of myfile with $1, but now I'd like to change the behavior as different cases.
EDIT: I also would like a...
In one of my bash scripts I needed to obtain the last part of a colon delimited string. For example I needed to grab the numeric 289283 value from the following value:
OK: DriveC-ReadBytesPerSec: 289283
After some trial and error I arrived at the following:
READRESULT="OK: DriveC-ReadBytesPer...
If I start an app with this command:
/path/to/my/command >> /var/log/command.log
And the command doesn't return, is there a way, from another prompt, to see what the STDOUT redirect is set to?
I'm looking for something like either
cat /proc/PID/redirects
or
ps -??? | grep PID
but ...
I am a php programmer and i just wanted to learn linux shell scripting now.. i would like to know few things from the experts over here before starting.
will this learning add any value to
my resume so that i can get a job in mnc.
If yes which linux should i prefer
to use and start learning...
I'm attempting to clean out a bunch of temporary files from a folder tree, but don't want to delete files that match some criteria, specifically executable files or .tpl files.
I see the question here
Delete files in a directory that match a regexp, using a Mac terminal
is almost what I'm look...
I have many old (data) CDs.
I want to copy them all to the disk, but the problem is that some of these CDs are no longer readable and it is extremely tiresome to copy the CDs one by one.
Is there some tool to expedite this process?
I'm looking for a tool that will test my internet connection bandwidth and create an simple report... like speedtest do...
Do you know some program/tool that do this... if possible that run on CentOS.
On my Debian server, I upgraded the SQLite package to version 3.7.7 but discovered that it contains a critical bug that breaks several things including my Subversion repository. So, I would like to downgrade back to the previous version I was using. But:
I have no idea what that version was (I...
I've been using the GNU units program and I seem to think that I should be able to convert water between a volume and a weight.
Examples:
You have: 1 gram water
You want: cm^3
conformability error
1 gram water = 9.80665 kg^2 / m^2 s^2
cm^3 = 1e-06 m^3
and
You have: 1 gallon water
You...
I am trying to figure out a decent way to copy what I have in a tmux buffer into my clipboard. I have tried a couple of different things like
bind-key p select-pane -t 2 \; split-window 'xsel -i -b' \; paste-buffer
which gets me fairly close, all I have to do is hit control-d after I do pref...
When I run sudo aptitude update from the console, I see output with lines such as this:
Get:1 http://security.ubuntu.com lucid-security Release.gpg [198B]
Ign http://security.ubuntu.com/ubuntu/ lucid-security/main Translation-en_GB
or this:
Hit http://security.ubuntu.com lucid-security Releas...
right now when I run man smth or similar less is used to view it. However, on Mac OS X, I really like scrolling with touchpad instead on up/down or page-up/page-down buttons. Is there a way to just print text into the terminal instead of using less or more?
I installed Python 2.7 from source. A dependency of some packages is python. Is there a way I can prevent the install of a lesser version of Python, or let apt know it's already been fulfilled?
When I run the TOP command, a process shows 1208% cpu usage and the total CPU usr time is 81.7% with IRIX mode on. When I change to IRIX mode off, the process shows 99% cpu usage and the total user cpu time is 43%.
Any ideas what might be going on? These are VM machines.
When looking at comparisons, it seems to me that there could be a 1:1 mapping between their feature sets. Yet, an often cited statement is that "Mercurial is easier". What is the base of this statement? (if any)
