Technical notes, and other ideas.
Refer: https://www.linuxshelltips.com/extract-email-addresses-from-text-file/
Input File: missing_pricing_emails.txt
Grab the email addresses
grep -oe "[a-zA-Z0-9._]\+@[a-zA-Z]\+\.[a-zA-Z]\+" missing_pricing_emails.txt | sort | uniq -cOr count how many are there
grep -oe "[a-zA-Z0-9._]\+@[a-zA-Z]\+\.[a-zA-Z]\+" missing_pricing_emails.txt | sort | uniq -c | wc -lRefer: https://unix.stackexchange.com/questions/364922/grep-getting-confused-by-filenames-with-dashes
Issues, a grep command by default gets confused if the dash name starts with a dash. Here are two solutions:
grep -- "look-for-me" *find . | while read f; do grep "look-for-me" "$f"; doneMake sure both input files are sorted and UPPERCASE
Lines only in file1.txt
diff -d -i -w file1.txt file2.txt | grep "^[<]" > file1-only.txtLines only in file2.txt
diff -d -i -w file1.txt file2.txt | grep "^[>]" > file2-only.txtLines common in both files
diff -u -d -i -w file1.txt file2.txt | grep -v "^[-+]" > both-files.txtgrep -ir --include \*.conf "prdweb2" 2>/dev/null
Refer: https://stackoverflow.com/questions/38270261/how-to-extract-a-string-from-between-two-patterns-in-bash
Looking for parameter between -Dappdynamics.agent.nodeName= and closing space
$ ps aux | grep -i appdynamics | grep -oP '(?<= -Dappdynamics.agent.nodeName=)[^ ]+'
$ grep -oP '(?<= -Dappdynamics.agent.nodeName=)[^ ]+' input.txt
-o tells grep to only output the matching part(s) of each line.
-P activates support for PCREs (Perl-compatible regular expressions), which support look-behind assertions such as (?<= inet:), which allow a sub-expression (inet:, in this case) to participate in matching, without being captured (returned) as part of the matched string. [^ ]+ then simply captures everything after inet: up to the first space char. (character set [^ ] matches any char. that is not (^) a space, and + matches this set 1 or more times).
$ grep -ir --include pom.xml "<java.version>"
Refer: https://stackoverflow.com/questions/12516937/grep-but-only-certain-file-extensions
$ grep -r -i --include \*.h --include \*.cpp CP_Image ~/path[12345] | mailx -s GREP email@domain.com
grep -A 1 -i "Search-for-something" /var/lib/jbossas/server/halprdjbs01/log/server.log
6.1 Display N lines after match
-A is the option which prints the specified N lines after the match as shown below.
Syntax:
grep -A <N> "string" FILENAME
The following example prints the matched line, along with the 3 lines after it.
$ grep -A 3 -i "example" demo_text
6.2 Display N lines before match
-B is the option which prints the specified N lines before the match.
Syntax:
grep -B <N> "string" FILENAME
When you had option to show the N lines after match, you have the -B option for the opposite.
$ grep -B 2 "single WORD" demo_text
6.3 Display N lines around match
-C is the option which prints the specified N lines before the match. In some occasion you might want the match to be appeared with the lines from both the side. This options shows N lines in both the side(before & after) of match.
$ grep -C 2 "Example" demo_text
Give this a go:
find . -not -iwholename '*.svn*' | egrep -i "(java|jsp)" | xargs grep -i "find-something" | more
grep -ir "/secure" * | grep -v ".svn"
Did not work very well:
grep --exclude=".svn" -ir "SEARCH-STRING" *
Use the following example with Cygwin to "-r" recursively scan "-i" ignoring case "-l" list files and use "-E" regular expression which finds all strings that have a pairing of
grep -r -i -l -E 'personal.+information' *.jsp