How can a file be rid of three lines in sequence like the sample below:
to get:
Note that the digits between square brackets may be more than one, comprising a comma, or a full-stop; and that the string between brackets may differ from each other in the different lines.
Hi all,
I'm newbi in scripting.
could someone tell how to delete the ^M at the end of the linie with an awk command.
many thanks in advance. (2 Replies)
Hi
I need a perl onliner to delete a line in a file starting with few words.
Example
file.txt
----------
my name is don
I live in London
I am woking as engineer
I want to delete a line starting with 'I live in' using perl oneliner and in place edit with out temporary files
Thanks... (2 Replies)
How to delete ending/trailing spaces using awk,sed,perl?
Input:(each line has extra spaces at the end)
3456 565
3 7
35 878
Expected output:
3456 565
3 7
35 878 (5 Replies)
I have a Unix file with 200,000 records, and need to remove all records from the file that have the character ‘I' in position 68 (68 bytes from the left). I have searched for similar problems and it appears that it would be possible with sed, awk or perl but I do not know enough about any of these... (7 Replies)
Hi, I'm totally new to awk, so thanks in advance for your help.
I want to make a csv file out of a text file I've exported from a database I want to do two things:
1. Change pipes ("|") to commas (",") to make a text file into CSV
2. Remove the second line of the file, which is useless junk. ... (3 Replies)
Ok I have a file that contains
#num.txt
1 2 3
4 5 6
7 8 9
my script main.sh checks to see if the first two arguments exist in a seperate file and the third argument would be the value in the num.txt
so when i execute
$ main.sh name place 5
how would i go about deleteing the... (13 Replies)
Hi all,
I need a Perl one liner which prints a newline into a .txt file, only where the line starts with "/mediawiki-1.19.0/". It should add the newline to the line before.
My problem is, when I try to realize this (with my little knowledge :rolleyes: ) i come to the point where the // are... (4 Replies)
Hi all,
As of now am using an awk command to check the number of columns in a file that has 10 lakh rows.
Is it possible to remove that particular line having an extra column and copy the remaining lines to a new file ?
YOUR HELP IS HIGHLY APPRECIATED. THANKS IN ADVANCE (5 Replies)
Discussion started by: Rahul619
5 Replies
LEARN ABOUT PLAN9
tr
TR(1) General Commands Manual TR(1)NAME
tr - translate characters
SYNOPSIS
tr [ -cds ] [ string1 [ string2 ] ]
DESCRIPTION
Tr copies the standard input to the standard output with substitution or deletion of selected characters (runes). Input characters found
in string1 are mapped into the corresponding characters of string2. When string2 is short it is padded to the length of string1 by dupli-
cating its last character. Any combination of the options -cds may be used:
-c Complement string1: replace it with a lexicographically ordered list of all other characters.
-d Delete from input all characters in string1.
-s Squeeze repeated output characters that occur in string2 to single characters.
In either string a noninitial sequence -x, where x is any character (possibly quoted), stands for a range of characters: a possibly empty
sequence of codes running from the successor of the previous code up through the code for x. The character followed by 1, 2 or 3 octal
digits stands for the character whose 16-bit value is given by those digits. The character sequence followed by 1, 2, 3, or 4 hexadecimal
digits stands for the character whose 16-bit value is given by those digits. A followed by any other character stands for that character.
EXAMPLES
Replace all upper-case ASCII letters by lower-case.
tr A-Z a-z <mixed >lower
Create a list of all the words in one per line in where a word is taken to be a maximal string of alphabetics. String2 is given as a
quoted newline.
tr -cs A-Za-z '
' <file1 >file2
SOURCE
/sys/src/cmd/tr.c
SEE ALSO sed(1)TR(1)