vi : inserting non-printing characters


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting vi : inserting non-printing characters
# 1  
vi : inserting non-printing characters

I am trying to edit a syslinux msg file. I want to precede color codes with control characters. I have tried insert mode, then control v followed by the color code; however, I continue to get " [O " if I type the color code or enter ESC mode. How can I just insert say " ^L " ?
# 2  
Too little info to give a good answer, what is the reason for the control characters?
# 3  
I have setup a pxe linux server. I am trying to edit the boot.msg file. I want to customize it using various colors. I need to be able to put a control charcter followed by the color code. For example:

#vi boot.msg


^L

^O0aWelcome to the Pxe Linux Installer^00a




Note: The would display "Welcome to the Pxe Linux Installer" in red text.
The color codes are in HEX. I am having trouble nserting the color code
after the control caret.
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #906
Difficulty: Easy
A Unix shell repeatedly prints a prompt, waits for a command line on stdin, and then carries out some action, as directed by the contents of the command line.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Inserting n characters to beginning of line if match

I would like to insert n number of characters at the beginning of each line that starts with a given character. If possible, I would be most appreciative for a sed or awk solution. Given the data below, I would like to be able to insert either 125 spaces or 125 "-" at the beginning of every line... (6 Replies)
Discussion started by: jvoot
6 Replies

2. Shell Programming and Scripting

Remove non printing characters from file

How do I remove the printer escape sequence, the first 5 characters, that occurs on every 33rd line in a file, see hex dump of line 1. 0000 1e 00 00 00 00 0a 0a 0a 20 0a 20 20 20 20 20 20 .... 0010 20 20 20 20 20 20 20 20 20 20 0a 42 49 4c 4c 20 Thanks, (2 Replies)
Discussion started by: jgt
2 Replies

3. UNIX for Dummies Questions & Answers

inserting characters based on condition

hi i have a file that contains the data like this 12345 12453 8990998987 0989876656 12345678 12344 133678999 12345677 i should insert "+" and "-" signs for each line i,e., + 12345 - 12453 + 8990998987 - 0989876656 + 12345678 - 12344 (2 Replies)
Discussion started by: anurupa777
2 Replies

4. Linux

Removing non printing characters from a csv file

Hi, I have an csv file and there are some non printable characters(extended ascii) so I am trying to create a clean copy of the csv file . I am using this command: tr -cd "" < /opt/informatica/PowerCenter8.6.0/server/infa_shared/SrcFiles/ThirdParty/locations.csv > ... (4 Replies)
Discussion started by: gerkus
4 Replies

5. UNIX for Dummies Questions & Answers

Inserting control characters at the end of each line

How to add control characters at the end of each line in a file? Can anyone help me with this? Thanks, Shobana (2 Replies)
Discussion started by: Shobana_s
2 Replies

6. UNIX for Dummies Questions & Answers

printing password having special characters

Hi I have a password stored in a file (which is a user input) The password is having the special character $ say the password is pw$ord and is stored in the file pw_note I am using the following statement to store the passowrd in a variable $schema_pwd = `cat $dir/pwd_note` ; Now if i print... (4 Replies)
Discussion started by: ssuresh1999
4 Replies

7. Shell Programming and Scripting

printing last two characters of each line

Hello, any trick to print line number and last two characters of each line ? (4 Replies)
Discussion started by: Bashar
4 Replies

8. UNIX for Dummies Questions & Answers

Printing 5 raw characters to a printer

Hi there, I want to open a cash drawer remotely. The cash drawer is commanded by a printer. I need to connect to the cash drawer which is connected over a network (and shared) and simply send a sequence of five ASCII commands (see http://pages.prodigy.net/daleharris/popopen2.htm) to a... (5 Replies)
Discussion started by: Friğrik
5 Replies

9. Shell Programming and Scripting

inserting characters before each line...

Hi , the fog is fulling my brain after holidays , somebody can help me ? I have a file in input like that : toto tata tutu and trying with awk to insert the compete file string as : /dir1/dir2/toto /dir1/dir2/tata /dir1/dir2/tutu i used to write : awk 'BEGIN {FS="\\"} {print... (4 Replies)
Discussion started by: Nicol
4 Replies

10. UNIX for Dummies Questions & Answers

printing control characters

using c-shell, does anyone know how to send control characters to the printer before the job? I need to set a printer to print in condensed mode HELP (1 Reply)
Discussion started by: mglinsk
1 Replies

Featured Tech Videos