hi,
I am a begginer in unix and i want to know how to open a file and read it and separate the numbers & words and storing it in separate files, Using shell scripting.
Please help me out for this.
Regards
S.Kamakshi (2 Replies)
Hi,
How to separate numbers and words(with full alphabets) in a particular file and store it in two different files.
Please help me out for this.Using shell scripting.
:confused::confused: (1 Reply)
Hi,
Say I have this text file <copy.out> that contains a list of files/directories to be copied out to a different location.
$ more copy.out
dir1/file1
dir1/file2
dir1/file3
"dir1/white space"
dir1/file4
If I do the following:
$copy=`more copy.out`
$echo $copy
dir1/file1... (4 Replies)
I have many pdf's scattered across 4 machines. There is 1 location where I have other Pdf's maintained. But the issues it the 4 machines may have duplicate pdf's among themselves, but I want just 1 copy of each so that they can be transfered to that 1 location.
What I have thought is:
1) I have... (11 Replies)
I have a list of mail ids in text file and want a ksh script that reads this text file and sends a mail to all mail ids with same subject line and content.
I am using UX-HP machine and KSH.
Thanks for help in advance! (5 Replies)
I am trying to write a script that will copy all file listed in a text file (100s of file names) to a new directory
Assume script will run with main as current working directory and I know how many files/lines will be in List.txt
Im trying to work up a test script using this model
Contents of... (2 Replies)
Hi Team,
Here's the scenario,
I have a text file called "file_list.txt". Its content is as follows.
111.tmp
112.tmp
113.tmp
114.tmp
These files will present in "workdir" directory. It has many files. But only the files present in file_list.txt has to be deleted from the workdir... (7 Replies)
I have a directory that is restricted and I cannot just copy the files need, but I can cat them and redirect them to a new directory. The files all have the date listed in them. If I perform a long listing and grep for the date (150620) I can redirect that output to a text file. Now I need to... (5 Replies)
Hello Everyone,
I want to delete the image files from a directory, which are not listed in a TEXT file.
The directory contains large number of image files (in millions) required / not required. I want to delete the image files which are "not required".
I have generated a Text file having... (3 Replies)
Discussion started by: Praveen Pandit
3 Replies
LEARN ABOUT V7
grep
GREP(1) General Commands Manual GREP(1)NAME
grep, egrep, fgrep - search a file for a pattern
SYNOPSIS
grep [ option ] ... expression [ file ] ...
egrep [ option ] ... [ expression ] [ file ] ...
fgrep [ option ] ... [ strings ] [ file ]
DESCRIPTION
Commands of the grep family search the input files (standard input default) for lines matching a pattern. Normally, each line found is
copied to the standard output; unless the -h flag is used, the file name is shown if there is more than one input file.
Grep patterns are limited regular expressions in the style of ed(1); it uses a compact nondeterministic algorithm. Egrep patterns are full
regular expressions; it uses a fast deterministic algorithm that sometimes needs exponential space. Fgrep patterns are fixed strings; it
is fast and compact.
The following options are recognized.
-v All lines but those matching are printed.
-c Only a count of matching lines is printed.
-l The names of files with matching lines are listed (once) separated by newlines.
-n Each line is preceded by its line number in the file.
-b Each line is preceded by the block number on which it was found. This is sometimes useful in locating disk block numbers by con-
text.
-s No output is produced, only status.
-h Do not print filename headers with output lines.
-y Lower case letters in the pattern will also match upper case letters in the input (grep only).
-e expression
Same as a simple expression argument, but useful when the expression begins with a -.
-f file
The regular expression (egrep) or string list (fgrep) is taken from the file.
-x (Exact) only lines matched in their entirety are printed (fgrep only).
Care should be taken when using the characters $ * [ ^ | ? ' " ( ) and in the expression as they are also meaningful to the Shell. It is
safest to enclose the entire expression argument in single quotes ' '.
Fgrep searches for lines that contain one of the (newline-separated) strings.
Egrep accepts extended regular expressions. In the following description `character' excludes newline:
A followed by a single character matches that character.
The character ^ ($) matches the beginning (end) of a line.
A . matches any character.
A single character not otherwise endowed with special meaning matches that character.
A string enclosed in brackets [] matches any single character from the string. Ranges of ASCII character codes may be abbreviated
as in `a-z0-9'. A ] may occur only as the first character of the string. A literal - must be placed where it can't be mistaken as
a range indicator.
A regular expression followed by * (+, ?) matches a sequence of 0 or more (1 or more, 0 or 1) matches of the regular expression.
Two regular expressions concatenated match a match of the first followed by a match of the second.
Two regular expressions separated by | or newline match either a match for the first or a match for the second.
A regular expression enclosed in parentheses matches a match for the regular expression.
The order of precedence of operators at the same parenthesis level is [] then *+? then concatenation then | and newline.
SEE ALSO ed(1), sed(1), sh(1)DIAGNOSTICS
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files.
BUGS
Ideally there should be only one grep, but we don't know a single algorithm that spans a wide enough range of space-time tradeoffs.
Lines are limited to 256 characters; longer lines are truncated.
GREP(1)