06-21-2004
The whole point is to avoid reading the entire file even once. So even something like
sed '$d' <old > new
is too much.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
For lists in sed, to say what to replace, is this correct:
I am hoping that this would recognise that either a "." is present, or that the substitution happens at the end of the line.
For files with extensions , my script works perfectly.
My problem is, files without extentions, i.e. . ... (1 Reply)
Discussion started by: busillis
1 Replies
2. UNIX for Dummies Questions & Answers
How to copy entire file content into another file being in last line mode of vi ?
---------- Post updated at 10:07 AM ---------- Previous update was at 09:56 AM ----------
Got it :
:1,30w file.txt (1 Reply)
Discussion started by: presul
1 Replies
3. Shell Programming and Scripting
Hi,
I am having a file which is fix length and comma seperated. And I want to replace values for one column.
I am reading file line by line in variable $LINE and then replacing the string.
Problem is after changing value and writing new file temp5.txt, formating of original file is getting... (8 Replies)
Discussion started by: Mruda
8 Replies
4. Shell Programming and Scripting
Hi ,
I need your kind help for my below requirement
I need to copy and entire txt file to a certain position to the target file .
Source file has 3 lines and it has to be copied to the target file in position from line 10 to 12.
Thanks for your support (1 Reply)
Discussion started by: Pratik4891
1 Replies
5. Shell Programming and Scripting
Hi
I have a data file 'File2' consisting of 105670 lines. I want to copy and paste 17928 lines from 'File1' to 'File2' but I want to place it in between lines 21 and 17950 of 'File2'. How do I do it in awk?
For example-
File A has 5 lines
X
Y
1 2 3
4 5 6
7 8 9
and File B has
A
b... (1 Reply)
Discussion started by: ananyob
1 Replies
6. Shell Programming and Scripting
Hi
I have a data file 'File2' consisting of 105670 lines. I want to copy and paste 17928 lines from 'File1' to 'File2' but I want to place it in between lines 21 and 17950 of 'File2'. How do I do it in awk?
For example-
File A has 5 lines
X
Y
1 2 3
4 5 6
7 8 9
and File B has
A
b... (1 Reply)
Discussion started by: ananyob
1 Replies
7. Shell Programming and Scripting
I have a text file that has data like:
Data "12345#22"
Fred
ID 12345
Age 45
Wilma
Dino
Data "123#22"
Tarzan
ID 123
Age 33
Jane
I need to figure out a way of adding 1,000,000 to the specific lines (always same format) in the file, so it becomes:
Data "1012345#22"
Fred
ID... (16 Replies)
Discussion started by: say170
16 Replies
8. Shell Programming and Scripting
Hi,
How do we write the contents of multiple files created in awk body to a new file in awk (END block) ? when I used "getline", it is consuming more time. Do we have any other way other than getline? (1 Reply)
Discussion started by: Cool
1 Replies
9. Shell Programming and Scripting
so i have several files that look somewhat like this:
{
"afafa": "afaf",
"afafaa" : ""
}
<newline>
<newline>
i want to grab everything in the file except the empty new lines at the end. note, there may be newlines within the content itself.
(
"afafa": "afaf",... (3 Replies)
Discussion started by: SkySmart
3 Replies
10. Shell Programming and Scripting
Greetings.
I've got a csv file with data along these lines:
Spumoni's Pizza Place, Placemats n Things, Just Lamps
Counterfeit Dollars by Vinnie, Just Shades, Dollar StoreI want to replace the entire comma-delimited field if it matches something ending in "Place" or beginning with "Dollar",... (2 Replies)
Discussion started by: palmfrond
2 Replies
LEARN ABOUT DEBIAN
debconf-set-selections
DEBCONF-SET-SELECTIONS(1) Debconf DEBCONF-SET-SELECTIONS(1)
NAME
debconf-set-selections - insert new default values into the debconf database
SYNOPSIS
debconf-set-selections file
debconf-get-selections | ssh newhost debconf-set-selections
DESCRIPTION
debconf-set-selections can be used to pre-seed the debconf database with answers, or to change answers in the database. Each question will
be marked as seen to prevent debconf from asking the question interactively.
Reads from a file if a filename is given, otherwise from stdin.
WARNING
Only use this command to seed debconf values for packages that will be or are installed. Otherwise you can end up with values in the
database for uninstalled packages that will not go away, or with worse problems involving shared values. It is recommended that this only
be used to seed the database if the originating machine has an identical install.
DATA FORMAT
The data is a series of lines. Lines beginning with a # character are comments. Blank lines are ignored. All other lines set the value of
one question, and should contain four values, each separated by one character of whitespace. The first value is the name of the package
that owns the question. The second is the name of the question, the third value is the type of this question, and the fourth value (through
the end of the line) is the value to use for the answer of the question.
Alternatively, the third value can be "seen"; then the preseed line only controls whether the question is marked as seen in debconf's
database. Note that preseeding a question's value defaults to marking that question as seen, so to override the default value without
marking a question seen, you need two lines.
Lines can be continued to the next line by ending them with a "" character.
EXAMPLES
# Force debconf priority to critical.
debconf debconf/priority select critical
# Override default frontend to readline, but allow user to select.
debconf debconf/frontend select readline
debconf debconf/frontend seen false
OPTIONS
--verbose, -v
verbose output
--checkonly, -c
only check the input file format, do not save changes to database
SEE ALSO
debconf-get-selections(1) (available in the debconf-utils package)
AUTHOR
Petter Reinholdtsen <pere@hungry.com>
2012-09-10 DEBCONF-SET-SELECTIONS(1)