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Full Discussion: How to change name of the file with first line of the file which has some unwanted text in it?
Top Forums UNIX for Beginners Questions & Answers How to change name of the file with first line of the file which has some unwanted text in it? Post 303030072 by Sekhar419 on Tuesday 5th of February 2019 06:05:17 PM
Old 02-05-2019
How to change name of the file with first line of the file which has some unwanted text in it?
I have a log file, which i have divided into 14 files using csplit, the file looks like below

Code:
test-000000
test-000001 #and so on until 14

now I want all the 14 files generated to be renamed as the some part of test in first line of the file how can i eliminate the unwanted text?

sample first line of the file looks like, all the files have similar format

Code:
0-00:01:01.412 <main>:[UNIT]:[info]:  Test: SCHEDULE_REQUEST_TestCase ...

I want to rename the file as SCHEDULE_REQUEST_TestCase.log
I know that mv command can be used to rename the file, and read or head can be used to read the first line of the file, but i want to remove the text before SCHEDULE and dots after TestCase.

This is what i have at the moment

Code:
line="$(head -n 1 test-000000)"
mv test-000000 ${line}.log

I want to perform this for all the files i have generated i don't really get how to do that and eliminate the unwanted text from the first line? I guess sed or awk can be used to eliminate the text I have started shell scripting like five days ago any help would be greatly appreciated.
 

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LEARN ABOUT CENTOS

doveadm-log

DOVEADM-LOG(1)							      Dovecot							    DOVEADM-LOG(1)

NAME

       doveadm-log - Locate, test or reopen Dovecot's log files

SYNOPSIS

       doveadm [-Dv] log errors [-s min_timestamp]
       doveadm [-Dv] log find [directory]
       doveadm [-Dv] log reopen
       doveadm [-Dv] log test

DESCRIPTION

       The  doveadm  log commands are used to locate and reopen the log files of dovecot(1).  It's also possible to test the configured targets of
       the *log_path settings.

OPTIONS

       Global doveadm(1) options:

       -D     Enables verbosity and debug messages.

       -v     Enables verbosity, including progress counter.

COMMANDS

   log errors
       doveadm log errors [-s min_timestamp]

       The log errors command is used to show the last	- up to 1,000 - errors and warnings.  If no output is generated, no errors  have  occurred
       since the last start.

       -s min_timestamp
	      An  integer  value, representing seconds since the epoch - also known as Unix timestamp.	When a min_timestamp was given, doveadm(1)
	      will only show errors occurred since that point in time.

   log find
       doveadm log find [directory]

       The log find command is used to show the location of the log files, to which dovecot(1) sends its log messages.	 If  dovecot(1)  logs  its
       messages  through  syslogd(8)  and doveadm(1) could not find any log files, you can specify the directory where your syslogd writes its log
       files.

   log reopen
       doveadm log reopen

       This command causes doveadm to reopen all log files, configured in the log_path, info_log_path and debug_log_path settings.  These settings
       are configured in /etc/dovecot/conf.d/10-logging.conf.
       This is for example useful after manually rotating the log files.

   log test
       doveadm log test

       This command causes doveadm to write the message "This is Dovecot's priority log (timestamp)" to the configured log files.  The used prior-
       ities are: debug, info, warning, error and fatal.

EXAMPLE

       This example shows how to locate the log files used by dovecot(1).

       doveadm log find
       Looking for log files from /var/log
       Debug: /var/log/dovecot.debug
       Info: /var/log/mail.log
       Warning: /var/log/mail.log
       Error: /var/log/mail.log
       Fatal: /var/log/mail.log

REPORTING BUGS

       Report bugs, including doveconf -n output, to the Dovecot Mailing List <dovecot@dovecot.org>.  Information about reporting bugs	is  avail-
       able at: http://dovecot.org/bugreport.html

SEE ALSO

       doveadm(1)

Dovecot v2.2							    2013-11-24							    DOVEADM-LOG(1)
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