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Top Forums Shell Programming and Scripting Print first 20 lines from all .log files Post 302800407 by hanson44 on Monday 29th of April 2013 04:40:25 PM
Old 04-29-2013
Code:
awk 'FNR == 1 { print "Printing first 20 lines of: " FILENAME } { print } FNR == 20 { nextfile }' *.log

 

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GLANCE-CACHE-PREFETCHER(1)					      Glance						GLANCE-CACHE-PREFETCHER(1)

NAME
glance-cache-prefetcher - Glance Cache Pre-fetcher GLANCE IMAGE CACHE PRE-FETCHER Author glance@lists.launchpad.net Date 2012-01-03 Copyright OpenStack LLC Version 2012.1-dev Manual section 1 Manual group cloud computing SYNOPSIS glance-cache-prefetcher [options] DESCRIPTION This is meant to be run from the command line after queueing images to be pretched. OPTIONS --version show program's version number and exit -h, --help show this help message and exit --config-file=PATH Path to a config file to use. Multiple config files can be specified, with values in later files taking precedence. The default files used are: [] -d, --debug Print debugging output --nodebug Do not print debugging output -v, --verbose Print more verbose output --noverbose Do not print verbose output --log-config=PATH If this option is specified, the logging configuration file specified is used and overrides any other logging options specified. Please see the Python logging module documentation for details on logging configuration files. --log-format=FORMAT A logging.Formatter log message format string which may use any of the available logging.LogRecord attributes. Default: none --log-date-format=DATE_FORMAT Format string for %(asctime)s in log records. Default: none --log-file=PATH (Optional) Name of log file to output to. If not set, logging will go to stdout. --log-dir=LOG_DIR (Optional) The directory to keep log files in (will be prepended to --logfile) --use-syslog Use syslog for logging. --nouse-syslog Do not use syslog for logging. --syslog-log-facility=SYSLOG_LOG_FACILITY syslog facility to receive log lines SEE ALSO o OpenStack Glance BUGS o Glance is sourced in Launchpad so you can view current bugs at OpenStack Glance AUTHOR
OpenStack COPYRIGHT
2010-present, OpenStack, LLC. 2012.1.1 March 14, 2013 GLANCE-CACHE-PREFETCHER(1)
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