Re: Limits of grep?
Shaul Karl wrote: Then xargs won't work either, will it? xargs has flags -n , -l , -s to limit amount od args xargs execs each time. Thus, having find . -name "*" | xargs -n 500 , and assuming that find will return 654 file names, xargs will run _twice_, one time with 500 args, second time with 154 However, more elegant (IMHO) solution is not to use find and xargs at all, but instead use : ls | while read file_name ; do grep pattern $filename ; done (sh syntax used ) = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED] = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Limits of grep?
On Wed, Sep 27, 2000, Omer Musaev wrote about "Re: Limits of grep?": xargs has flags -n , -l , -s to limit amount od args xargs execs each time. Thus, having find . -name "*" | xargs -n 500 , and assuming that find will return 654 file names, xargs will run _twice_, one time with 500 args, second time with 154 However, more elegant (IMHO) solution is not to use find and xargs at all, but instead use : ls | while read file_name ; do grep pattern $filename ; done (sh syntax used ) Yes, but that will run the 'grep' program 654 times, compared to 2 times in the xargs solution in your example! Forgetting for a moment the small difference in grep output between one and many files, the problem with your last solution is that it is much slower because the grep executable is loaded 654 times, fork is done 654 times, share libraries are linked 654 times, and so on. On todays computers, with fast CPUs, disks, in-memory disk cache, and fast fork, this is not bad (but still not good!), but in the good-old-days, the xargs solution would be significantly more efficient. So if you need a quick-and-dirty script, use a loop like Omer suggested (but it contains a small typo - fix it first!) - it's more flexible and general. But if efficiency is important, the xargs solution wins. If you're looking for less typing, the xargs solution is shorter too :) -- Nadav Har'El| Wednesday, Sep 27 2000, 27 Elul 5760 [EMAIL PROTECTED] |- Phone: +972-53-245868, ICQ 13349191 |I want to be a human being, not a human http://nadav.harel.org.il |doing -- Scatman John = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Limits of grep?
On Wed, 27 Sep 2000, Omer Musaev wrote:
Shaul Karl wrote:
Then xargs won't work either, will it?
xargs has flags -n , -l , -s to limit amount od args xargs execs each time.
Thus, having find . -name "*"| xargs -n 500 , and assuming that find will return
654 file names, xargs will run _twice_, one time with 500 args, second time with 154
However, more elegant (IMHO) solution is not to use find and xargs at all, but
instead use :
ls| while read file_name ; do grep pattern $filename ; done
(shsyntax used )
Which is equivalent to:
find . -maxdepth 1 -exec grep pattern {} \;
similar to what Shachar has sugested in the first place
--
Tzafrir Cohen
mailto:[EMAIL PROTECTED]
http://www.technion.ac.il/~tzafrir
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Re: REDHAT 7
yep, it's a booting problem. Trouble is, i don't have a boot diskkete, and wouldn't know what to do even if i had one see the problem??? MS On Tue, 26 Sep 2000, Shapira Home Mail wrote: Having trouble with my redhat 6.2 (after upgrading my windows to ME). Is it a good idea to install redhat 7?? a better idea would be to try solving your problem - it is most likely just a booting problem, and this could occure every tme you install another OS on your machine - e.g. when you re-install windows ME after it gets trashed for the first time ;) is it avalible for download on israeli ftps?? look at www.linux.org.il - there is a post there about RH 7.0's availability. prepare a high-bandwidth connection, or a very very very long download time, to down the disk image(s?). guy "For world domination - press 1, or dial 0, and please hold, for the creator." -- nob o. dy = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED] = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: problem with HP-C1537A tape drive(DDS2,DDs3)
I hope It'll help:
try setting the -B option for the dump command. from dump's man page:
-
-B records
The number of 1 KB blocks per volume. This option overrides the
calculation of tape size based on length and density.
---
In other words, you tell dump how long your tape is. So if you enter -B
you tell dump that it has *very* big (obviously not possible) tape media. Then
its up to you to calcualte the backup needs with regard to tape volume needed.
This causes dump to stop from telling you "The tape media is full - please
replace..."
I use this in my work. ( I think this is what is quoted below)
Boaz.
avishaya wrote:
Hi,
I have tried to backup with dump to a tape drive model
HP-C1537A(dds2,dds3)
on (symbios scsi - ncr53c8xx) on linux box(version 6 - kernel
2.2.12-20).
Yes, the OS recognize the tape and load the "st" module(scsi id 2).
when i type : mt -f /dev/nst0 stat (ofcourse when i put DDS3 media)
SCSI 2 tape drive:
File number=1, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x25 (DDS-3).
Soft error count since last status=0
General status bits on (8101):
EOF ONLINE IM_REP_EN
when i want to "dump" even the smallest partition( /boot - 20MB)
dumping /dev/sda5
DUMP: Date of this level 0 dump: Sun Sep 17 15:21:57 2000
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/sda5 (/home) to /dev/nst0
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 5897597 tape blocks on 1.44 tape(s).
DUMP: Volume 1 started at: Sun Sep 17 15:22:06 2000
DUMP: End of tape detected
DUMP: Closing /dev/nst0
DUMP: Volume 1 completed at: Sun Sep 17 15:22:29 2000
DUMP: Volume 1 took 0:00:23
DUMP: Volume 1 transfer rate: 2 KB/s
DUMP: Change Volumes: Mount volume #2
DUMP: Is the new volume mounted and ready to go?: ("yes" or "no")
DUMP: "Yes" or "No"?
Don`t be mistake of the size of the partition above.it occures on every
single partition i want to dump
this is only the log of my backup script which begins to dump firstly
the most important data(/home)
but even , if i try manually to dump the /boot partition (or /opt), i
can`t.
When i "tail" the /var/log/messages , this is what i get:
Sep 17 13:28:48 localhost kernel: st0: Error with sense data: [valid=0]
Info fld=0x0, Current st09:00: sense key Aborted Command
Sep 17 13:28:48 localhost kernel: Additional sense indicates Data phase
error
Now, i know that it`s not an hardware prbolem(to be sure, i configured
it on ULTRA SPARC station -
solaris 2.6 + windows nt workstation and it workes without any
problem.
I also use new media.
sure , i used an old Dynatek tape before and it worked fine , untill it
died.
And yes i tried to play with dump arguments( dump 0usf 410 .)
and yes i "played" with mt options. but without any luck
Any ideas
Thanks
Avishay
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MadDog meeting postponed to 21:00
Hi Ira asked me to informed you that The MadDog Meeting was postponed to 21:00. --ury = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: RFC: How do I set my time-zone data?
Hi I felt this was missing in the FAQ, but I really didn't feel like reading too many docs, so I wrote: http://www.iglu.org.il/faq/cache/116.html The information there is a bit partial, and maybe slightly incorrect. Anybody wishes to correct this? And while we're at it: Anybody bothers updating the source zoneinfo from libc (At least on my Mandrake it is part of the glibc package)? I recently upgraded to glibc 2.1.3 and the new Israel zoneinfo was not included, although they are at least half a year old. Wasn't glibc 2.1.3 released at end of Feb? A small note about the instructions in ftp://ftp.cs.huji.ac.il/pub/tz/israel/linux/INSTALL (the redhat section): why not use: timeconfig Asia/Jerusalem instead of step 7? As far as I am aware of, the utility for time configuration is distro dependent: [16:46:39 /tmp]$ locate timeconfig [16:53:44 /tmp]$ locate tzconfig /usr/sbin/tzconfig /usr/share/man/man1/tzconfig.1.gz [16:53:54 /tmp]$ regards -- Tzafrir Cohen mailto:[EMAIL PROTECTED] http://www.technion.ac.il/~tzafrir = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED] -- Shaul Karl [EMAIL PROTECTED] Donate free food to the world's hungry: see http://www.thehungersite.com = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
ISDN connection to bezeqint: a short list of phone numbers to dial.
Just in case someone else will try to use bezeqint services. I have an ISDN connection to the Internet and am located in central Tel-Aviv. The short summary of my ISDN connection problem to bezeqint is as follows: I have tried the following phone numbers: 1) 640 - Do not use it. It does not gives the expected bandwidth of an ISDN line. This conclusion is backed up by another member of this list + bezeqint support. 2) 136014 - This seems to get me to 927. The bandwidth is as expected. However the connection is disconnected after 15min of inactivity. bezeqint support team says they are not responsible (they claim it is the line or Bezeq fault). 3) 725 - the one to use. -- Shaul Karl [EMAIL PROTECTED] Donate free food to the world's hungry: see http://www.thehungersite.com = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: ISDN connection to bezeqint: a short list of phone numbers to dial.
Shaul - I use 136373 number - and as far as I know it supports the 128k very well - and it's included in the "hodshi hofshi" program for fixed payment. Hetz Shaul Karl wrote: Just in case someone else will try to use bezeqint services. I have an ISDN connection to the Internet and am located in central Tel-Aviv. The short summary of my ISDN connection problem to bezeqint is as follows: I have tried the following phone numbers: 1) 640 - Do not use it. It does not gives the expected bandwidth of an ISDN line. This conclusion is backed up by another member of this list + bezeqint support. 2) 136014 - This seems to get me to 927. The bandwidth is as expected. However the connection is disconnected after 15min of inactivity. bezeqint support team says they are not responsible (they claim it is the line or Bezeq fault). 3) 725 - the one to use. -- Shaul Karl [EMAIL PROTECTED] Donate free food to the world's hungry: see http://www.thehungersite.com = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED] = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: REDHAT 7
On Wed, 27 Sep 2000, Shapira Home Mail wrote: yep, it's a booting problem. Trouble is, i don't have a boot diskkete, and wouldn't know what to do even if i had one see the problem??? yes. the problem is that this problem is bound to occur to you again in the future - will you want to re-install linux everytime it happens, instead of learning once how to solve it properly? i'm not writing this to annoy you - i'm writing this cause i had this problem more then once, and many other users on this list also encounter this problem occasionaly, and thus there are solutions to this problem that are easier to employ then a full re-install. the basic idea is to boot your system from a floppy (or a rescue CD - for example, if you have the red-hat 6.2 instal CD, you may boot your PC off of t, and when it gives you te first prompt, type 'linux recue'). if you don't posess a rescue disk, you may download one off the network. a good one is tom's boot-root kit, but there are many others as well - make a search for 'linux rescue floppy' in some search engine and you'll find one. after booting with the rescue disk, you need to mount the root partition of your linux instalation, and run lilo, telling lilo where your configuratin file is using its '-C' command line option. it'll take some time getting this done the first time. when you succeed, write down the procedure, so the next time that windows will wipe lilo off your system - you'll know what to do. guy "For world domination - press 1, or dial 0, and please hold, for the creator." -- nob o. dy = To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
