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for some reason word count always counts one extra character.
for example,
echo 11 | wc -c
counts 3 characters instead of 2
anyone know how to get the exact number of characters?

thanks but those words might be in different lines, awk and grep both look for words into one line at a time.

tnx a lot,
now what if I want to limit my sed further more so that it only looks for the lines that have 144 or 275 somewhere in them?
this is what I have:
sed...

hi, how does regular expression for "or" and "and" work in sed?
like if I want sed to find and do something only with the lines that contain "abc" or "123" pattern. or lines that have "abc" and...

tnx but that doesnt work in grep.
but worked well with egrep.

how can I search for two or more patterns in one line using grep?
for example if I want to show only the lines that have patterns "abc" and "123"?
and what if I want to show only the lines that...

anyone knows what this regular expression matches for?
[0-9]\(3,\).*\1.*\1

anyone knows what does this regular expression match for?

[0-9]\(3,\).*\1.*\1

I gotta write a command to change the accounts in /etc/passwd that use a shell other than the bash to bash shell. those accounts that dont use a shell shouldnt get modified. assuming all the shell...

ok I finally figured it out after 3hour of struggling.

sed 's/\(.*\{3,\}\)\(.*\)\(\1\)/(\1)\2(\3)/g' filename

I just figured it out.

sed 's/\(.*\{3,\}\)\(.*\)\(\1\)/(\1)\2(\3)/g' file

hi,
I need to write a command with sed to find all the lines in a file that contain patterns of three or more characters that repeat once and put them inside perenthezes. I cannot tell sed what...

hi tnx but that's not what I am looking for.
like I said I dont want to specify then pattern for sed.
I want it automatically find all the patterns that are repeated and do something with them. the...

ok let's say I have this line for example:
thispatternthatpattern
I want the sed automatically find the the repeated patterns and put them in (). so after the chagne it would look like this, ...

hi thanks for the reply, but I need the sed command to find all repeating patterns itself and put them inside (). I can not specify the pattern for it to look for.
it can be 123 or abc or anything...

hi,
I need to write a command to look into a text file, find lines that contain patterns of three or more characters that repeat once, and put perenthesizes around them. so for example, the line...