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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}

1

In a ksh shell script I am using a grep command to get a specific word as shown below.

$ cat file.txt

abc xyzdef.123 def.jkl mnopqrst



$ grep -o "wdefw" file.txt

xyzdef

def

I want output to be xyzdef.123 and def.jkl

It is not fetching the value after . Is there any other way to grep this word also I don't know the exact word to grep only I know a pattern. I am working on ksh shell.

shell-script

share|improve this question

edited 1 hour ago

Inian

6,1901633

asked 1 hour ago

ArnavArnav

112

add a comment | 

1

In a ksh shell script I am using a grep command to get a specific word as shown below.

$ cat file.txt

abc xyzdef.123 def.jkl mnopqrst



$ grep -o "wdefw" file.txt

xyzdef

def

I want output to be xyzdef.123 and def.jkl

It is not fetching the value after . Is there any other way to grep this word also I don't know the exact word to grep only I know a pattern. I am working on ksh shell.

shell-script

share|improve this question

edited 1 hour ago

Inian

6,1901633

asked 1 hour ago

ArnavArnav

112

add a comment | 

In a ksh shell script I am using a grep command to get a specific word as shown below.

$ cat file.txt

abc xyzdef.123 def.jkl mnopqrst



$ grep -o "wdefw" file.txt

xyzdef

def

I want output to be xyzdef.123 and def.jkl

It is not fetching the value after . Is there any other way to grep this word also I don't know the exact word to grep only I know a pattern. I am working on ksh shell.

shell-script

share|improve this question

edited 1 hour ago

Inian

6,1901633

asked 1 hour ago

ArnavArnav

112

$ cat file.txt

abc xyzdef.123 def.jkl mnopqrst



$ grep -o "wdefw" file.txt

xyzdef

def

share|improve this question

edited 1 hour ago

Inian

6,1901633

asked 1 hour ago

ArnavArnav

112

share|improve this question

edited 1 hour ago

Inian

6,1901633

asked 1 hour ago

ArnavArnav

112

edited 1 hour ago

Inian

6,1901633

edited 1 hour ago

Inian

6,1901633

asked 1 hour ago

ArnavArnav

112

asked 1 hour ago

ArnavArnav

112

1 Answer
1

active

oldest

votes

0

With the attempt you have, you can't match the whole word to be returned. The -o flag of grep only returns the matched regex portion defined. Also w is not a POSIX defined extension for grep and might be available only in the GNU versions which support the PCRE syntax. On which you could do

grep -oP '(w*)def[.](w*)'

The -P flag turns on the PCRE regex mode in GNU grep and the -o flag returns the whole word matched the regex defined. The regex is translated as match zero or more number of alphanumeric characters followed by def and a literal . ( enclosed in a bracket expression ) and followed by zero or more number of alphanumeric characters.

Using POSIX character classes for alphanumeric characters would be doing below. But remember the flag -o is still a GNU extension

grep -o '([[:alnum:]]*)def[.]([[:alnum:]]*)' 

share|improve this answer

edited 53 mins ago

answered 1 hour ago

InianInian

6,1901633

add a comment | 

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0

With the attempt you have, you can't match the whole word to be returned. The -o flag of grep only returns the matched regex portion defined. Also w is not a POSIX defined extension for grep and might be available only in the GNU versions which support the PCRE syntax. On which you could do

grep -oP '(w*)def[.](w*)'

The -P flag turns on the PCRE regex mode in GNU grep and the -o flag returns the whole word matched the regex defined. The regex is translated as match zero or more number of alphanumeric characters followed by def and a literal . ( enclosed in a bracket expression ) and followed by zero or more number of alphanumeric characters.

Using POSIX character classes for alphanumeric characters would be doing below. But remember the flag -o is still a GNU extension

grep -o '([[:alnum:]]*)def[.]([[:alnum:]]*)' 

share|improve this answer

edited 53 mins ago

answered 1 hour ago

InianInian

6,1901633

add a comment | 

0

With the attempt you have, you can't match the whole word to be returned. The -o flag of grep only returns the matched regex portion defined. Also w is not a POSIX defined extension for grep and might be available only in the GNU versions which support the PCRE syntax. On which you could do

grep -oP '(w*)def[.](w*)'

The -P flag turns on the PCRE regex mode in GNU grep and the -o flag returns the whole word matched the regex defined. The regex is translated as match zero or more number of alphanumeric characters followed by def and a literal . ( enclosed in a bracket expression ) and followed by zero or more number of alphanumeric characters.

Using POSIX character classes for alphanumeric characters would be doing below. But remember the flag -o is still a GNU extension

grep -o '([[:alnum:]]*)def[.]([[:alnum:]]*)' 

share|improve this answer

edited 53 mins ago

answered 1 hour ago

InianInian

6,1901633

add a comment | 

With the attempt you have, you can't match the whole word to be returned. The -o flag of grep only returns the matched regex portion defined. Also w is not a POSIX defined extension for grep and might be available only in the GNU versions which support the PCRE syntax. On which you could do

grep -oP '(w*)def[.](w*)'

The -P flag turns on the PCRE regex mode in GNU grep and the -o flag returns the whole word matched the regex defined. The regex is translated as match zero or more number of alphanumeric characters followed by def and a literal . ( enclosed in a bracket expression ) and followed by zero or more number of alphanumeric characters.

Using POSIX character classes for alphanumeric characters would be doing below. But remember the flag -o is still a GNU extension

grep -o '([[:alnum:]]*)def[.]([[:alnum:]]*)' 

share|improve this answer

edited 53 mins ago

answered 1 hour ago

InianInian

6,1901633

grep -oP '(w*)def[.](w*)'

grep -o '([[:alnum:]]*)def[.]([[:alnum:]]*)' 

share|improve this answer

edited 53 mins ago

answered 1 hour ago

InianInian

6,1901633

answered 1 hour ago

InianInian

6,1901633

answered 1 hour ago

InianInian

6,1901633