How about this:-
To explain, this will get all lines that do not match any of the expression. The expression is explained as:-
Quote:
" - start of expression
^# - match lines starting with #
| - or
^_ - match lines starting with _
| - or
^$ - match empty lines
| - or
^ *$ - lines contianing only spaces
" - end of expression
You could then append either a redirect to create a new file (don't try to overwrite the source file) or perhaps a pipe to another process, e.g.
I hope that this helps, but please post back if I've missed the point.
I need to read the last file for a particular day, such as, "Jun 13" because the CSV file is cumulative for the entire day, so I don't want all the previous files, I just want the last file, for that day.
I ran an 'ls -al | grep "June 13" > myLs.txt' (simplified) to list all files from that day.... (2 Replies)
Hi Guys
How u all doing?
I am having tough time to achieve this I have a unix .ksh script which calls
sql script
Right now I harcoded column id's in sql script but I want to read them from a txt file
1084,1143,1074,1080,1091,1090,1101,1069,1104,1087,1089,1081
I want to read this... (4 Replies)
Hello,
I have a set of .txt files I cannot read.
This is a part of what I see.
Is there a way to view these files?
_MO<P.6D@K;WU<B$X-;)SIV/ROO!UL+1P=VTT-?,SLC`MI/6QMS#UYGGT\+)C=#\UIO`TL/0]=#/T)
it's about 3 pages.
Thanks for your help.
Joe (3 Replies)
i'm a beginner in shell and i have a txt file that is updating every second or msec so i need a program to read the last line of this txt file
is this possible to do? (5 Replies)
Hello All,
I just want help in coding a simple shell script since i am a newbie for UNIX and i started learning unix and shell scripting basics recently.
I am having a data like this in .txt file.
Product Name : XYZ
Price : 678.1
Best Buy Price : 600
Product Name : ABC
Price : 465... (3 Replies)
Hi,
I need to read one file which excludes the line starting with #.
example file:
#Working directory
WORK_DIR|/home/mypath
#Remote directory
REMOTE_DIR|/home/remote
I am reading this file with the following code,
while read line;
do
KEY=`echo "$line" | cut -d "|" -f 1`
... (5 Replies)
Hi everyone,
I have two files (A and B) and want to combine them to one by always taking 10 rows from file A and subsequently 6 lines from file B. This process shall be repeated 40 times (file A = 400 lines; file B = 240 lines).
Does anybody have an idea how to do that using perl, awk or sed?... (6 Replies)
Hi all,
I'm new in unix. Need some help here.
I have a file called server.cfg which contains the servers name, if I don't want to run on that server, I'll put a "#" infront it.
username1@hostname.com
username2@hostname.com
#username3@hostname.com
#username4@hostname.com... (17 Replies)
I am new to ksh scripts. I would like to be able to read a file line by line from a certain line number. I have a specific line number saved in a variable, say $lineNumber. How can I start reading the file from the line number saved in $lineNumber? Thanks! (4 Replies)
e.g.
File name: File.txt
cat File.txt
Result:
#INBOUND_QUEUE=FAQ1
INBOUND_QUEUE=FAQ2
I want to get the value for one which is not commented out.
Thanks, (3 Replies)
Discussion started by: Tanu
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)