Very Expensive Running Shoes Post: 302886546

2 More Discussions You Might Find Interesting

1. Programming

Which is more expensive ?

I have the following code snippet's. Which one among these would be more expensive ? #1 for (int fd = 0; fd <= 1024; ++fd) close(fd); #2 for (int fd = 0; fd <= 1024; fd += 8) { close(fd); close(fd+1); close(fd+2);...

2. Programming

calling pthread_self (on ubuntu), expensive?

Hi all, Is anyone aware of what operations are involved when a call to pthread_self() is made, obtaining the unique thread ID on a Ubuntu system (or even any Linux flavour)? Specifically, to retrieve the thread id, is there any locking required or atomic operations? I'm building an...

LEARN ABOUT DEBIAN

approx-gc

APPROX-GC(8)						      System Manager's Manual						      APPROX-GC(8)

NAME

       approx-gc - garbage-collect the cache of Debian archive files

SYNOPSIS

       approx-gc [OPTION]...

DESCRIPTION

       approx-gc  scans  the  cache created by approx(8) and finds files that are corrupted or no longer needed.  With no options specified, these
       files are listed on standard output and removed from the cache.

       A corrupted file is one whose size or checksum does not match the value specified in the Packages or Sources file.

       An unneeded file is one that is not referenced from any distribution's Packages or Sources file.

       approx-gc may take several minutes to finish.

OPTIONS

       -c file, --config file
	      Specify an additional configuration file.  May be used multiple times.

       -f, --fast
	      Don't perform checksum validation.

       -k, --keep, -s, --simulate
	      Don't remove files from the cache.

       -q, --quiet
	      Don't print file names.

       -v, --verbose
	      Print the reason for removal of each file.

EXAMPLES

       To remove all unneeded or corrupted files from the cache:

	      approx-gc --quiet

       This is run as a weekly cron(8) job.

       To list the files that would be removed from the cache, without actually doing so:

	      approx-gc --keep

FILES

       /etc/approx/approx.conf
	      Configuration file for approx and related programs.

       /var/cache/approx
	      Default cache directory for archive files.

SEE ALSO

       approx.conf(5), approx(8), cron(8)

AUTHOR

       Eric Cooper <ecc@cmu.edu>

								     May 2011							      APPROX-GC(8)