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- [root@centos6 bin]# grep -A 2 -B 2 "SampleTextFile.txt" /var/log/messages
- Nov 10 00:14:54 centos6 kernel: Kernel logging (proc) stopped.
- Nov 10 00:14:54 centos6 rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="1513" x-info="http://www.rsyslog.com"] exiting on signal 15.
- File SampleTextFile.txt
- First Line after original SampleTextFile.txt
- Nov 12 18:13:48 centos6 kernel: imklog 5.8.10, log source = /proc/kmsg started.
- Nov 12 18:13:48 centos6 rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="1519" x-info="http://www.rsyslog.com"] start
- --
- Nov 12 18:14:19 centos6 polkitd[2382]: started daemon version 0.96 using authority implementation `local' version `0.96'
- Nov 12 18:14:19 centos6 rtkit-daemon[2388]: Sucessfully made thread 2386 of process 2386 (/usr/bin/pulseaudio) owned by '42' high priority at nice level -11.
- File SampleTextFile.txt
- Second Line after original SampleTextFile.txt
- Nov 12 18:14:19 centos6 pulseaudio[2386]: alsa-util.c: Disabling timer-based scheduling because running inside a VM.
- Nov 12 18:14:19 centos6 rtkit-daemon[2388]: Sucessfully made thread 2392 of process 2386 (/usr/bin/pulseaudio) owned by '42' RT at priority 5.
- [root@centos6 bin]#
- [root@centos6 bin]# grep -m 1 -A 2 -B 2 "SampleTextFile.txt" /var/log/messages
- Nov 10 00:14:54 centos6 kernel: Kernel logging (proc) stopped.
- Nov 10 00:14:54 centos6 rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="1513" x-info="http://www.rsyslog.com"] exiting on signal 15.
- File SampleTextFile.txt
- [root@centos6 bin]#
- [root@centos6 bin]# grep -V
- grep (GNU grep) 2.20
- Copyright (C) 2014 Free Software Foundation, Inc.
- License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
- This is free software: you are free to change and redistribute it.
- There is NO WARRANTY, to the extent permitted by law.
- Written by Mike Haertel and others, see <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>.
- [root@centos6 bin]#
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