Provided by: apache2-utils_2.4.18-2ubuntu3_amd64 bug

NAME

       htcacheclean - Clean up the disk cache

SYNOPSIS

       htcacheclean  [  -D  ]  [  -v ] [ -t ] [ -r ] [ -n ] [ -Rround ] -ppath
       [-llimit| -Llimit]

       htcacheclean [ -n ] [ -t ] [ -i ] [ -Ppidfile ] [ -Rround ]  -dinterval
       -ppath [-llimit| -Llimit]

       htcacheclean [ -v ] [ -Rround ] -ppath [ -a ] [ -A ]

       htcacheclean [ -D ] [ -v ] [ -t ] [ -Rround ] -ppath url

SUMMARY

       htcacheclean  is  used  to  keep  the  size of mod_cache_disk's storage
       within a given size limit, or limit on inodes in use. This tool can run
       either  manually  or  in  daemon  mode. When running in daemon mode, it
       sleeps in the background and checks  the  cache  directory  at  regular
       intervals  for  cached  content  to be removed. You can stop the daemon
       cleanly by sending it a TERM or INT signal. When run manually,  a  once
       off  check  of  the  cache  directory  is made for cached content to be
       removed. If one or more URLs are specified, each URL  will  be  deleted
       from the cache, if present.

OPTIONS

       -dinterval
              Daemonize and repeat cache cleaning every interval minutes. This
              option is mutually exclusive with the -D, -v and -r options.  To
              shutdown the daemon cleanly, just send it a SIGTERM or SIGINT.

       -D     Do  a dry run and don't delete anything. This option is mutually
              exclusive with the -d option. When doing a dry run and  deleting
              directories  with  -t,  the inodes reported deleted in the stats
              cannot take into account the directories deleted,  and  will  be
              marked as an estimate.

       -v     Be  verbose  and  print  statistics.  This  option  is  mutually
              exclusive with the -d option.

       -r     Clean thoroughly. This assumes that the Apache web server is not
              running  (otherwise  you  may  get  garbage  in the cache). This
              option is mutually exclusive with the -d option and implies  the
              -t option.

       -n     Be  nice.  This  causes  slower  processing  in  favour of other
              processes. htcacheclean will sleep from time to time so that (a)
              the  disk  IO  will  be  delayed and (b) the kernel can schedule
              other processes in the meantime.

       -t     Delete all empty directories. By default only  cache  files  are
              removed,  however  with  some configurations the large number of
              directories created may require attention. If your configuration
              requires  a  very large number of directories, to the point that
              inode or file allocation table exhaustion may become  an  issue,
              use of this option is advised.

       -ppath Specify  path  as  the  root  directory  of the disk cache. This
              should be  the  same  value  as  specified  with  the  CacheRoot
              directive.

       -Ppidfile
              Specify  pidfile as the name of the file to write the process ID
              to when daemonized.

       -Rround
              Specify round as the amount to round sizes up to, to  compensate
              for  disk  block  sizes.  Set  to  the  block  size of the cache
              partition.

       -llimit
              Specify limit as the total disk cache size limit. The  value  is
              expressed  in  bytes  by default (or attaching B to the number).
              Attach K for Kbytes or M for MBytes.

       -Llimit
              Specify limit as the total disk cache inode limit.

       -i     Be intelligent and run only when there was a modification of the
              disk  cache.  This  option is only possible together with the -d
              option.

       -a     List the URLs currently stored in the  cache.  Variants  of  the
              same URL will be listed once for each variant.

       -A     List  the  URLs  currently stored in the cache, along with their
              attributes in the following order: url, header size, body  size,
              status,  entity  version,  date,  expiry, request time, response
              time, body present, head request.

DELETING A SPECIFIC URL

       If htcacheclean is passed one or more URLs, each URL  will  be  deleted
       from  the  cache.  If  multiple variants of an URL exists, all variants
       would be deleted.

       When a reverse proxied URL is to  be  deleted,  the  effective  URL  is
       constructed  from  the  Host  header, the port, the path and the query.
       Note the '?' in the URL must always be specified explicitly, whether  a
       query  string  is present or not. For example, an attempt to delete the
       path  /  from  the  server  localhost,  the  URL  to  delete  would  be
       http://localhost:80/?.

LISTING URLS IN THE CACHE

       By  passing  the  -a or -A options to htcacheclean, the URLs within the
       cache will be listed as they are found, one URL per line. The -A option
       dumps  the full cache entry after the URL, with fields in the following
       order:

       url    The URL of the entry.

       header size
              The size of the header in bytes.

       body size
              The size of the body in bytes.

       status Status of the cached response.

       entity version
              The number of times this  entry  has  been  revalidated  without
              being deleted.

       date   Date of the response.

       expiry Expiry date of the response.

       request time
              Time of the start of the request.

       response time
              Time of the end of the request.

       body present
              If 0, no body is stored with this request, 1 otherwise.

       head request
              If  1,  the entry contains a cached HEAD request with no body, 0
              otherwise.

EXIT STATUS

       htcacheclean returns a zero status  ("true")  if  all  operations  were
       successful, 1 otherwise. If an URL is specified, and the URL was cached
       and successfully removed, 0 is  returned,  2  otherwise.  If  an  error
       occurred during URL removal, 1 is returned.