Vim Match problem

I'd like to find all of the files in my home folder on Linux (Ubuntu, in this case) that contain a match a particular regular expression. Is there a simple Unix command that I can use in order to do this?

For example, I'd like to find all of the files in my home folder that contain a match of the following regex (here, using Javascript-style notation): ((R|r)eading(T|t)est(D|d)ata)

I'm trying to use find with the regex option. However my regular expression only captures the basename of the file. Is there a reference to the "directory find is currently in" I can use in my regular expression so that I don't have to account for it by means of a leading .*?

Hi, what ?* means in sh script? I know that ? is equivalent to at least one appearance of a preceding expression and * is equivalent to at least one appearance of preceding expression but I have difficulties with a way in which I should interpret following pattern:

-?*

I would expect that it should match expressions like -, --, --- because I read it as follows:

-?

Hi Everybody!

I need some help with a regular expression in Perl that will match files named messages, but also files named message.1, message.2 and so on.

my target is to match exactly IP address with three octes , while the four IP octet must be valid octet - between <0 to 255>

For example I have the following IP's in file

$ more file 192.9.200.10 192.9.200.100 192.9.200.1555 192.9.200.1 192.9.200.aaa 192.9.200.@ 192.9.200.: 192.9.200 192.9.200.

I need to match the first three octets - 192.9.200 while four octet must be valid ( 0-255)

I have a Bash script which installs a customised JBoss. The name of the JBoss instance is checked against a regular expression to make sure that the name is valid:

if [[ ! $1 =~ $instanceNameRegex ]]; then exit 1 fi

We now have a requirement for a second valid regex. ie the name must match either $instanceNameRegex or $secondInstanceNameRegex.

How do I achieve this in the if test?

Using grep (or some other utility), is it possible to find all matches of a regular expression in a folder (searching the text of each file?) I want to find every match of the regular expression zenity within a specific folder, so that I can find the file that contains the string zenity.

After some quick searching and not finding the answer, I decided to write this up for my own reference.My original inquiry was how do I form a double-bracketed if branch statement, using "=~" to check a variable against a regular expression for upper OR lower case of a specific search string in bash. After some working it out, I think I got it.

To match a word one can use

\v(\w+)

From the vim help :h \w:

\w word character: [0-9A-Za-z_]

This works exactly as described in the manual. However, I want to match words that contain characters beyond a-z, e.g. prästgården.