04-29-2009
help splitting a file into multiple files in bash
I have a file that logs multiple sessions. What I would like to do is split this file inclusive of the lines that include "starting session" and "shutting down" and ignore the data before and after the beginning of the first session and the end of the last session. The output files can be called whatever... session.1 session.2 ...
I am using bash.
blah blah
blah blah starting session blah blah
blah1 blah1 blah1
blah2 blah2 blah2
blah3 blah3 blah3
blah balh shutting down blah blah
blah3 blah5 starting session blah3 1blah
blah103 blah1 blah1
blah3 blah3 blah3
blah balh shutting down blah blah
blah blah
So, if I ran it against the bit above, I'd have
file1 (session.1):
blah blah starting session blah blah
blah1 blah1 blah1
blah2 blah2 blah2
blah3 blah3 blah3
blah balh shutting down blah blah
file2 (session.2):
blah3 blah5 starting session blah3 1blah
blah103 blah1 blah1
blah3 blah3 blah3
blah balh shutting down blah blah
Thanks,
Eric
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LAST(1) BSD General Commands Manual LAST(1)
NAME
last -- indicate last logins of users and ttys
SYNOPSIS
last [-n] [-h host] [-t tty] [user ...]
DESCRIPTION
Last will list the sessions of specified users, ttys, and hosts, in reverse time order. Each line of output contains the user name, the tty
from which the session was conducted, any hostname, the start and stop times for the session, and the duration of the session. If the ses-
sion is still continuing or was cut short by a crash or shutdown, last will so indicate.
-n Limits the report to n lines.
-h host Host names may be names or internet numbers.
-t tty Specify the tty. Tty names may be given fully or abbreviated, for example, ``last -t 03'' is equivalent to ``last -t tty03''.
If multiple arguments are given, the information which applies to any of the arguments is printed, e.g., ``last root -t console'' would list
all of ``root's'' sessions as well as all sessions on the console terminal. If no users, hostnames or terminals are specified, last prints a
record of all logins and logouts.
The pseudo-user reboot logs in at reboots of the system, thus ``last reboot'' will give an indication of mean time between reboot.
If last is interrupted, it indicates to what date the search has progressed. If interrupted with a quit signal last indicates how far the
search has progressed and then continues.
SEE ALSO
lastcomm(1), utmpx(5), ac(8)
HISTORY
Last appeared in 3.0BSD.
4th Berkeley Distribution June 6, 1993 4th Berkeley Distribution