11-12-2008
print the line immediately after a regexp; but regexp is a sentence
Good Day,
Im new to scripting especially awk and sed. I just would like to ask help from you guys about a sed command that prints the line immediately after a regexp, but not the line containing the regexp.
sed -n '/regexp/{n;p;}' filename
What if my
regexp is 3 word or a sentence. Im using date as my starting point for my logs because its based on a tail alert log that updates daily. sample of it is below:
Completed: ALTER DATABASE RECOVER CANCEL
Starting ORACLE instance (normal)
Thu Nov 13 12:41:34 2008
alter database mount standby database
ORA-1100 signalled during: alter database mount standby database...
Thu Nov 13 12:41:34 2008
ALTER DATABASE RECOVER standby database
Media Recovery Start
ORA-279 signalled during: ALTER DATABASE RECOVER standby database ...
Thu Nov 13 12:41:36 2008
ALTER DATABASE RECOVER CONTINUE DEFAULT
Thu Nov 13 12:41:36 2008
Media Recovery Log /oracle/P03/oraarch/P03arch1_7314.dbf
Thu Nov 13 12:42:15 2008
ORA-279 signalled during: ALTER DATABASE RECOVER CONTINUE DEFAULT ...
Thu Nov 13 12:42:15 2008
ALTER DATABASE RECOVER CONTINUE DEFAULT
Thu Nov 13 12:42:15 2008
Media Recovery Log /oracle/P03/oraarch/P03arch1_7315.dbf
Hope you could help me out because im really stuck here for my script.
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LEARN ABOUT DEBIAN
plan9-grep
GREP(1) General Commands Manual GREP(1)
NAME
grep, g - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
g [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines that match the pattern, a regular expression as defined in regexp(7) with
the addition of a newline character as an alternative (substitute for |) with lowest precedence. Normally, each line matching the pattern
is `selected', and each selected line is copied to the standard output. The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-e The following argument is taken as a pattern. This option makes it easy to specify patterns that might confuse argument parsing,
such as -n.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
-f The pattern argument is the name of a file containing regular expressions one per line.
-b Don't buffer the output: write each output line as soon as it is discovered.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'. An expression starting with '*' will treat the rest of the expression as literal characters.
G invokes grep with -n and forces tagging of output lines by file name. If no files are listed, it searches all files matching
*.C *.b *.c *.h *.m *.cc *.java *.cgi *.pl *.py *.tex *.ms
SOURCE
/src/cmd/grep
/bin/g
SEE ALSO
ed(1), awk(1), sed(1), sam(1), regexp(7)
DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)