Sponsored Content
Top Forums Shell Programming and Scripting best way to insert a line at the top of a file? Post 302285780 by quirkasaurus on Monday 9th of February 2009 04:06:16 PM
Old 02-09-2009
you mean on a file that's already there???

if the file in question isn't so huge it crashes vi, try this:

Code:
vi file << EOF
OWhatever you want as first line
^[:wq!
EOF

Where the ^[ is actually the ESCAPE character entered ( through vi ) with
CONTROL-V and ESC.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

SED- Insert text at top of file

Does anyone know how to insert text at the top and bottom of a file using sed? (12 Replies)
Discussion started by: MBGPS
12 Replies

2. UNIX for Advanced & Expert Users

Insert a line as the first line into a very huge file

Hello, I need to insert a line (like a header) as the first line of a very huge file (about 3 ml rows). I am able to do it with sed, but redirecting the output and creating a new file takes quite some time. I was wondering if there was a more efficient way of doing it? Any help would be... (3 Replies)
Discussion started by: shriek
3 Replies

3. Shell Programming and Scripting

insert text into top of file

how would you insert text into a existing file using aguments first arguments being the line of text and the second argument being file name (1 Reply)
Discussion started by: jimbob
1 Replies

4. UNIX for Dummies Questions & Answers

how do I insert argument into TOP of file using vi?

when directing some text into a file can you choose where it goes like the top of the file (which is text aswell) or the middle?? if so how - especially would like to know how to do so in vi (text editor) If i were to enter an argument ($1) into a another argument ($2) would it would be... (6 Replies)
Discussion started by: rprules
6 Replies

5. Shell Programming and Scripting

append a line into a file in the top

hi, My code is #!/bin/sh echo "\n\nPlease enter the month of the year(YYYYMM) : \c" read date_rep INPUT_L9_FILE=L9_Recharge_Description_EOM_$date_rep.csv #This part is used to summarise Grand_Total, Balance_Total of file L9_Recharge_Description_EOM_${1}.csv. awk -F"," '{if(NR!=1)... (5 Replies)
Discussion started by: madfox
5 Replies

6. UNIX for Advanced & Expert Users

Insert string in binary file at top

How can i append a EBCDIC string of 100 bytes to 0th position of a binary file in UNIX. (4 Replies)
Discussion started by: param_it
4 Replies

7. Shell Programming and Scripting

Insert a new line before every 5th line in a file

Hi, I need to insert a new line containing the string "QUERY" above every 5 lines. The below piece of code inserts a new line after every 5th line awk '{print $0} !(NR%5) {print "QUERY"}' sed 'n;n;n;n;G;' --> I do not know how to give "QUERY" string here But I need to insert it before... (4 Replies)
Discussion started by: royalibrahim
4 Replies

8. Shell Programming and Scripting

Insert date/time header at top of file

I'm trying to take mrt output and put it at the top of a file along with the date and time. I was able to do it at the bottom of the file with the following printf "********** $(date) **********\n\n" >> $OUTPUT_PATH/$HOSTNAME mtr -r -w -c 10 $HOSTADDRESS >> $OUTPUT_PATH/$HOSTNAME printf... (2 Replies)
Discussion started by: kramer65
2 Replies

9. Shell Programming and Scripting

How to read a text file line by line and insert into a database table?

I have a test file that I want to read and insert only certain lines into the the table based on a filter. 1. Rread the log file 12 Hours back Getdate() -12 Hours 2. Extract the following information on for lines that say "DUMP is complete" A. Date B. Database Name C.... (2 Replies)
Discussion started by: JolietJake
2 Replies

10. UNIX for Beginners Questions & Answers

Insert a line of text on nth line of a file

Hi All, I am using UNix Sun OS sun4u sparc SUNW,SPARC-Enterprise My intention is to insert a line of text after 13th line of every file inside a particular directory. While trying to do it for a single file , i am using sed sed '3 i this is the 4th line' filename sed: command garbled: 3... (5 Replies)
Discussion started by: gotamp
5 Replies
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> 2011-06-22 DEBCONF-SET-SELECTIONS(1)
All times are GMT -4. The time now is 03:32 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy