I'm writing a script which word counts the number of lines in two files. If one file is bigger than the other I'd like to edit one of the files to delete some lines to make both the same. It does not matter where in the file the lines are deleted from. It's expected that this will be ran from crontab in root. I'm trying to use sed to do this but am having problems with passing the variable number of lines to delete. Can anyone help?
To use a shell variable in a sed command, use double quotes rather than single quotes:
hi, I have an xml file and I need to replace the tags with different names all at a time here is what I have
<cevalue>
<cevalue1>
<cevalue2>
<cevalue3>
<cevalue4>
<cevalue5>
and I need these like these...
<cevalue>
<cevalue>
<cevalue>
<cevalue>
<cevalue>
<cevalue>
I tried a few but... (2 Replies)
I have a series of folders /temp/a /temp/b /temp/c
In folders a, b, and c, I have files
a1.txt..........a20.txt
b1.txt..........b40.txt &
c1.txt..........c60.txt
Each file has the same data format :-
Line 1 AAAAA aaaa
Line 2 BBB bbbbbb
Line 3 CCCC cccccc
Etc etc
I need to write a... (13 Replies)
Hi
I have a file which looks like this
//string = "abcd"; //info
//string = "*pqrs"; //add
string = "#123"; //sub
//string = "#1234567890"
data = check(string)
//string = "#1234567890"
I want to modify this as
string = "#987"; //mult
data = check(string)
How do i do that? (1 Reply)
Hi Penchal,
I would appreciate if you can provide me a brief explanation on what you are trying to do in the commnad below.
echo "6-9-2008" | sed 's/\(.\)-\(.\)-\(.*\)/\3-0\2-0\1/g'
Thanks
Amit (1 Reply)
I have done a script using sed which replaces a string in file.
I face 2 problems, while using sed command.
1)last line of the file is missing.
2)if i am are using wild card character in the command, Its not taking the next matching pattern ie if I am giving the pattern abc*def to be replaced... (2 Replies)
hi
i had posted this earlier.. got no reply !!
how to change assigned value in a file using sed
suppose the file contains
age = 30;
how to change it to
age =50;
i tried sed 's/^age*./age =50;' filename but i am getting the o/p as
age =50; 30;
plz hlp!! (4 Replies)
I have a sed query.
There is a line which has tilde and I want to separate this line using sed.
The line is:
ABP_ETC_ROOT=~xdmadm
The query to get this line is:
sed -n '/\(.*\)~\(.*\)/p' infile
I want to get xdmadm from this line and I am using this sed command:
sed -n... (5 Replies)
Hello Im fairly familiar with using the sed command for substitution, however I have been passed a script which checks the logged on username and directory type with a sed section which I cant figure out. The sed function has me baffled and I cant find out from the man page what its trying to do... (1 Reply)
Hi all, I am trying to use SED to input lines to a file in a specific place.
So far I have;
sed '/#NewEntry/ i\Insert this line' myfile.txt
The output is printing to screen correctly but what is the best way to write it back to the file without overwriting everything?
I tried adding >... (6 Replies)
Hi all, I am trying to remove quite a lot of numbers for a file I have which looks something along the lines of;
1,2,3,4,5,6 etc
I have a list of numbers I want removing looking like;
10000
10987
16572
etc
etc
and have been trying to run;
for id in `cat list` ; do sed -i -e... (8 Replies)
Discussion started by: JayC89
8 Replies
LEARN ABOUT OSF1
diff3
diff3(1) General Commands Manual diff3(1)NAME
diff3 - Compares three files
SYNOPSIS
diff3 [-e | -x | -E | -X | -3] file1 file2 file3
The diff3 command reads three versions of a file and writes to standard output the ranges of text that differ.
OPTIONS
Creates an edit script for use with the ed command to incorporate into file1 all changes between file2 and file3 (that is, the changes that
normally would be flagged ==== and ====3). Produces an edit script to incorporate only changes flagged ====. These are similar to -e and
-x, respectively, but treat overlapping changes (that is, changes that are flagged ==== in the normal listing) differently. The overlap-
ping lines from both files are inserted by the edit script, bracketed by <<<<<< and >>>>>> lines. The -E option is used by RCS merge to
ensure that overlapping changes in the merged files are preserved and brought to someone's attention. Produces an edit script to incorpo-
rate only changes flagged ====3.
DESCRIPTION
The diff3 command reads three versions of a file and writes to standard output the ranges of text that differ, flagged with the following
codes: All three files differ. file1 differs. file2 differs. file3 differs.
The type of change needed to convert a given range of a given file to match another file is indicated in one of these two ways in the out-
put: Text is to be added after line number number1 in file, where file is 1, 2, or 3. Text in the range line number1 to line number2 is to
be changed. If number1 = number2, the range may be abbreviated to number1.
The original contents of the range follow immediately after a c indication. When the contents of two files are identical, diff3 does not
show the contents of the lower-numbered file, although it shows the location of the identical lines for each.
NOTES
Editing scripts produced by the -e option cannot create lines consisting only of a single . (dot).
EXAMPLES
To list the differences among three files, enter: diff3 fruit.a fruit.b fruit.c
fruit.a, fruit.b, and fruit.c contain the following data:
fruit.a:
banana grape kiwi lemon mango orange peach pare
fruit.b:
apple banana grapefruit kiwi orange peach pear
fruit.c:
grape grapefruit kiwi lemon mango orange peach pear
The output from diff3 shows the differences between these files as follows. (The comments on the right do not appear in the output.)
==== All three files are different. 1:1,2c - Lines 1 and 2 of the first file, fruit.a
banana
grape 2:1,3c - Lines 1 through 3 of fruit.b
apple
banana
grapefruit 3:1,2c - Lines 1 and 2 of fruit.c
grape
grapefruit ====2 The second file, fruit.b, is different. 1:4,5c - Lines 4 and 5 are the same in fruit.a and fruit.c. 2:4a
3:4,5c - To make fruit.b look the same, add text after line 4.
lemon
mango ====1 The first file, fruit.a, is different. 1:8c
pare 2:7c - Line 7 of fruit.b and line 8 of fruit.c are the same. 3:8c
pear
FILES
Helper program.
SEE ALSO
Commands: bdiff(1), cmp(1), comm(1), diff(1), ed(1)diff3(1)