Hi guys, I hope you can help me with my problem.
I have a text file that contains lines like this:
78 ANGELO -809.05
79 ANGELO2 -5,000.06
I need to find all occurences of amounts that are negative and replace them with x's
78 ANGELO xxxxxxx
79... (4 Replies)
I have a long string in ASCII file of approx 60k bytes file size.
I need to know
1.How many charcters are adjectly in string.
export MAX_COL_SIZE=`awk "length>max{max=length}END{print max}" test.txt`
this return file cann't open...can anyone advice why??
2. How many 'TRX consist in my... (1 Reply)
Hey guys,
I have this file generated by me... i want to create some HTML output from it.
The problem is that i am really confused about how do I go about reading the file.
The file is in the following format:
TID1 Name1 ATime=xx AResult=yyy AExpected=yyy BTime=xx BResult=yyy... (8 Replies)
Hi All
Sometimes when I debug my C++ code with GDB an I want to view the content of my string variables I use the command "p <name of variable>" .
When strings are very long and their displayed content is truncated.
Do you know a way to see the whole content of those?
Thanks
M (5 Replies)
What's the best way to find a string in a very long file without newlines in Unix? The standard utility I'm aware of for finding a string in a single file is grep, but for a long file without newlines, I think the output is just going to be the input. I suppose I could use sed to replace the... (5 Replies)
I'm using a barcode scanner to grab ISBNs. Unfortunately, short of hitting "enter" each time (not easy while on a ladder), there's no good way to split it up. So I scanned it into a series of long lines in notepad.
Now, I need to split each line into 12-number lines.
instead of:... (4 Replies)
Hi Champs,
I am a newbie to unix world, and I am trying to built a script which seems to be far tough to be done alone by me.....
" I am having a raw csv file which contains around 50 fields..."
From that file I have to grep 2 fields "A" and "B"....field "A" is to be aligned vertically... (11 Replies)
here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb
cat dump.sql
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
Hi,
I have a very long pipe delimited string. The length of the string could vary. For example:
START|one|two|three|four|five|six|seven
START|one|two|three|four|five|six|seven|eight|nine
START|one|two|three|four
I want to replace in the third occurence of string with another... (9 Replies)
Hi everyone,
I am trying to insert a single very long string as the first line of a file,
So the following sed commands does what I want;
sed '1i\"","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"' file.txt
Think that all the... (3 Replies)
Discussion started by: hayreter
3 Replies
LEARN ABOUT ULTRIX
egrep
grep(1) General Commands Manual grep(1)Name
grep, egrep, fgrep - search file for regular expression
Syntax
grep [option...] expression [file...]
egrep [option...] [expression] [file...]
fgrep [option...] [strings] [file]
Description
Commands of the family search the input files (standard input default) for lines matching a pattern. Normally, each line found is copied
to the standard output.
The command patterns are limited regular expressions in the style of which uses a compact nondeterministic algorithm. The command patterns
are full regular expressions. The command uses a fast deterministic algorithm that sometimes needs exponential space. The command pat-
terns are fixed strings. The command is fast and compact.
In all cases the file name is shown if there is more than one input file. Take care when using the characters $ * [ ^ | ( ) and in the
expression because they are also meaningful to the Shell. It is safest to enclose the entire expression argument in single quotes ' '.
The command searches for lines that contain one of the (new line-separated) strings.
The command accepts extended regular expressions. In the following description `character' excludes new line:
A followed by a single character other than new line matches that character.
The character ^ matches the beginning of a line.
The character $ matches the end of a line.
A . (dot) 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 an * (asterisk) matches a sequence of 0 or more matches of the regular expression. A regular
expression followed by a + (plus) matches a sequence of 1 or more matches of the regular expression. A regular expression followed
by a ? (question mark) matches a sequence of 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 new line 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 the following: [], then *+?, then concatenation, then | and new
line.
Options-b Precedes each output line with its block number. This is sometimes useful in locating disk block numbers by context.
-c Produces count of matching lines only.
-e expression
Uses next argument as expression that begins with a minus (-).
-f file Takes regular expression (egrep) or string list (fgrep) from file.
-i Considers upper and lowercase letter identical in making comparisons and only).
-l Lists files with matching lines only once, separated by a new line.
-n Precedes each matching line with its line number.
-s Silent mode and nothing is printed (except error messages). This is useful for checking the error status (see DIAGNOSTICS).
-v Displays all lines that do not match specified expression.
-w Searches for an expression as for a word (as if surrounded by `<' and `>'). For further information, see only.
-x Prints exact lines matched in their entirety only).
Restrictions
Lines are limited to 256 characters; longer lines are truncated.
Diagnostics
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files.
See Alsoex(1), sed(1), sh(1)grep(1)