Re: Getting file sizes
"Shawn K. O'Shea" <[EMAIL PROTECTED]> writes: > Although Linux (ie GNU) du defaults to outputting sizes in k, OS X > does not. It counts blocks (512 byte blocks) Like a proper *BSD should ;) -- Seeya, Paul ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
On Monday, Oct 22nd 2007 at 10:17 -, quoth Ben Scott: =>On 10/22/07, Shawn K. O'Shea <[EMAIL PROTECTED]> wrote: =>> Since I know Kent has a Mac and this might be on his laptop, I'd like =>> to add that this should really be: =>> du -ck *.txt | tail -1 => => Since we're on the subject, it should also be noted that "du" means =>*disk usage*. That means du is supposed to be aware of things like =>allocation overhead (a 3 byte might use 4096 bytes on disk, or =>whatever) and sparse files (files with "holes" in the middle, thus =>using *less* space on disk than the file size). => => The GNU variant, at least, has an option to report actual file sizes =>instead of disk usage. => => Which one you want depends on what you're looking for. I'd just like to kibbutz one more subtlety: du reports disk usage as discussed above, but another way that you can get seemingly conflicting numbers is from sparse files, i.e., where the length of the file is large, but still contains little data. f = open ( "newfile", O_CREAT | O_WRONLY ); lseek ( f, 10, SEEK_SET ); close ( f ); Bang. You now have a file that ls will report as 1 gig and yet still occupies almost no space on the dick. -- Time flies like the wind. Fruit flies like a banana. Stranger things have .0. happened but none stranger than this. Does your driver's license say Organ ..0 Donor?Black holes are where God divided by zero. Listen to me! We are all- 000 individuals! What if this weren't a hypothetical question? steveo at syslang.net ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
On 10/22/07, Michael ODonnell <[EMAIL PROTECTED]> wrote: > Ooops - that "--files0-from=" option is apparently > new enough ... that it's probably not widely available. find . -xdev -type f -name "*.jpg" -print0 2>/dev/null | xargs -0 du -ch | tail -1 (untested) -- Ben ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
Shawn K. O'Shea wrote: >> du -c *.txt | tail -1 > > Since I know Kent has a Mac and this might be on his laptop, I'd like > to add that this should really be: > du -ck *.txt | tail -1 No, this is a bona fide Linux question :-) it's a Webfaction account. But thanks for the note! Kent ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
On 10/22/07, Shawn K. O'Shea <[EMAIL PROTECTED]> wrote: > Since I know Kent has a Mac and this might be on his laptop, I'd like > to add that this should really be: > du -ck *.txt | tail -1 Since we're on the subject, it should also be noted that "du" means *disk usage*. That means du is supposed to be aware of things like allocation overhead (a 3 byte might use 4096 bytes on disk, or whatever) and sparse files (files with "holes" in the middle, thus using *less* space on disk than the file size). The GNU variant, at least, has an option to report actual file sizes instead of disk usage. Which one you want depends on what you're looking for. -- Ben ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
On Monday 22 October 2007 09:36, Kent Johnson wrote: > Jim Kuzdrall wrote: > > On Monday 22 October 2007 09:11, Kent Johnson wrote: > >> How can I get the total size, in K, of all files in a directory > >> that match a pattern? > >> > >> For example, I have a dir with ~5000 files, I would like to know > >> the total size of the ~1000 files matching *.txt. > > > > Ah! Perhaps I actually know an answer to this one. (Very > > rare) > > > > Go to directory of interest and try > > du -shc *.txt > > That still lists each file individually, it needs to pipe to tail as > Stephen suggested. I thought of that, but you just said you wanted the answer. So I gave you the engineering approach: simplest approximation of adequate accuracy; minimum time spent. (It takes less than two seconds to scroll the file names on the screen, and it does confirm what type of files are being counted.) However, next time I need that info (which I often do), I will try to remember the "| tail -1" trick. Jim Kuzdrall ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
> Hmm, again, certainly not my fist instinct :) Paul, we embrace diversity here but that is *definitely* OT... ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
On 10/22/07, Stephen Ryan <[EMAIL PROTECTED]> wrote: > On Mon, 2007-10-22 at 09:11 -0400, Kent Johnson wrote: > > Newbie question: > > > > How can I get the total size, in K, of all files in a directory that > > match a pattern? > > > > For example, I have a dir with ~5000 files, I would like to know the > > total size of the ~1000 files matching *.txt. > > > > du -c *.txt | tail -1 Since I know Kent has a Mac and this might be on his laptop, I'd like to add that this should really be: du -ck *.txt | tail -1 Although Linux (ie GNU) du defaults to outputting sizes in k, OS X does not. It counts blocks (512 byte blocks) and the -k option to du explicitly says "I want output in k" and GNU du honors this even though it's the default). For additional examples... Solaris 9 == 512 by default, FreeBSD 6 == 1024 by default, NetBSD 1.6.1 == 512 by default, but they all honor -k -Shawn > > (That's "-(one)", not "-(ell)", meaning, you only want the last line of > output from du.) > > du prints out the sizes of each of the matching files; '-c' means you > want a total, too; piping the output through tail -1 picks out just the > last line with the total. > > -- > Stephen Ryan > Dartware, LLC > > ___ > gnhlug-discuss mailing list > gnhlug-discuss@mail.gnhlug.org > http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ > ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
Kent Johnson <[EMAIL PROTECTED]> writes: > Newbie question: > > How can I get the total size, in K, of all files in a directory that > match a pattern? Stephen Ryan <[EMAIL PROTECTED]> writes: > du -c *.txt | tail -1 > > du prints out the sizes of each of the matching files; '-c' means you > want a total, too; piping the output through tail -1 picks out just the > last line with the total. Hmmm, I wouldn't have chosen 'tail -1'. My instinct would have been to 'grep -i total', which is both more typing, and not as accurate (what if there was a filename containing the string 'total'?). "Michael ODonnell" <[EMAIL PROTECTED]> writes: > du -c -h --files0-from=<(find . -xdev -type f -name "*.jpg" -print0 \ > 2>/dev/null) | tail -1 Hmm, again, certainly not my fist instinct :) I almost *never* think to redirect stdin this way for some reason. Had I come up with the answer, I probably would have written it more like: find . -type f -name \*.muse -print0 | du -c --files0-from=- | tail -1 Which yields the same answer. I think I like mod's better :) Ted Roche <[EMAIL PROTECTED]> writes: > To get the result in K, specify: > > du -c --block-size=1024 *.txt Hmmm, I would have just used -k, or actually, let it default to that and not specify any flag at all regarding size. > or your choice of what you think K means ;) Though, it's very cool that you can specify exactly what you mean here. > man du tells more. Indeed it does! What a great little thread! :) -- Seeya, Paul ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
Ooops - that "--files0-from=" option is apparently new enough (my du version is 5.97) that it's probably not widely available. My home system has it, but my work systems don't... >-/ ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
Jim Kuzdrall wrote: > On Monday 22 October 2007 09:11, Kent Johnson wrote: >> How can I get the total size, in K, of all files in a directory that >> match a pattern? >> >> For example, I have a dir with ~5000 files, I would like to know the >> total size of the ~1000 files matching *.txt. > > Ah! Perhaps I actually know an answer to this one. (Very rare) > > Go to directory of interest and try > du -shc *.txt That still lists each file individually, it needs to pipe to tail as Stephen suggested. Kent ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
Kent Johnson wrote: > Newbie question: > > How can I get the total size, in K, of all files in a directory that > match a pattern? > > For example, I have a dir with ~5000 files, I would like to know the > total size of the ~1000 files matching *.txt. > > On RHEL and bash, if it matters... > Thanks, > Kent > ___ To get the result in K, specify: du -c --block-size=1024 *.txt or your choice of what you think K means ;) man du tells more. -- Ted Roche Ted Roche & Associates, LLC http://www.tedroche.com ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
More than you asked for, but here's a command that reports total space occupied by all files with names ending in .jpg, recursively from the current directory (but not crossing mount points) and which is also a gratuitous example of the Process Substitution facility mentioned in a previous thread: du -c -h --files0-from=<(find . -xdev -type f -name "*.jpg" -print0 2>/dev/null) | tail -1 ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
On Monday 22 October 2007 09:11, Kent Johnson wrote: > Newbie question: > > How can I get the total size, in K, of all files in a directory that > match a pattern? > > For example, I have a dir with ~5000 files, I would like to know the > total size of the ~1000 files matching *.txt. Ah! Perhaps I actually know an answer to this one. (Very rare) Go to directory of interest and try du -shc *.txt Jim Kuzdrall ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: Getting file sizes
On Mon, 2007-10-22 at 09:11 -0400, Kent Johnson wrote: > Newbie question: > > How can I get the total size, in K, of all files in a directory that > match a pattern? > > For example, I have a dir with ~5000 files, I would like to know the > total size of the ~1000 files matching *.txt. > du -c *.txt | tail -1 (That's "-(one)", not "-(ell)", meaning, you only want the last line of output from du.) du prints out the sizes of each of the matching files; '-c' means you want a total, too; piping the output through tail -1 picks out just the last line with the total. -- Stephen Ryan Dartware, LLC ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Getting file sizes
Newbie question: How can I get the total size, in K, of all files in a directory that match a pattern? For example, I have a dir with ~5000 files, I would like to know the total size of the ~1000 files matching *.txt. On RHEL and bash, if it matters... Thanks, Kent ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
