08-29-2006
Reading lines within vi editor
Hi All,
I need to read line by line from a file(created using vi editor) till end of the file and pass it to my own executables so that it will read first line and execute and then other and so on...Thanks
The steps are like this;
1) read first line in file
2) execute the job with first line as argument
3) read another line
4) execute the same job with second line as arguments
5) till end of file
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi All,
Please let me know how I can put a comment (e.g // or #) to more than 50 lines using vi editor in a .cpp/.sh file.
Thanks in advance. (3 Replies)
Discussion started by: artikulkarni
3 Replies
2. Shell Programming and Scripting
Hi all,
I have a file whose content I need to read and get the 3rd line .. ex:
one
two
three
What I need is to read a content of third line of this file and print first three characters ... I could print first three characters with "head -c 3" if I could get the content of the third line... (4 Replies)
Discussion started by: c0mrade
4 Replies
3. Shell Programming and Scripting
Hi,
I have a quick question regarding vi editor.Is it possible to interchange two lines in vi editor without using the possibilites of cut-paste,copy paste etc?
Your help is appreciated!
Regards
Dileep (4 Replies)
Discussion started by: DILEEP410
4 Replies
4. UNIX for Dummies Questions & Answers
I've been away from Unix and the vi editor for a while, and now I'm using vi (actually vim) in a Cygwin bash shell. When I copy-and-paste code examples (I'm playing with perl now) any time I paste code with lines beginning with the # character, vi inserts a # character at the beginning of every... (2 Replies)
Discussion started by: greenmangroup
2 Replies
5. Shell Programming and Scripting
Dear all,
I have a file like this:
imput
scaffold_0 1
scaffold_0 10000
scaffold_0 20000
scaffold_0 25000
scaffold_1 1
scaffold_1 10000
scaffold_1 20000
scaffold_1 23283
and I want the output like this:
scaffold_0 1 scaffold_0 10000
scaffold_0 10000 scaffold_0 20000... (6 Replies)
Discussion started by: valente
6 Replies
6. UNIX for Dummies Questions & Answers
Hi Folks,
If I open the logs in vi editor but as the logs get update after few seconds and I want to see the latest lines then whats the command to see the latest lines in vi editor itself , lets say I have open a log named abc.log in vi..!!
vi abc.log (2 Replies)
Discussion started by: SankalpS
2 Replies
7. UNIX for Dummies Questions & Answers
In my old shop, we only had AIX machines there (all of version 6.1 ). FTP ports were not open for these AIX machines because of some security thing. So, we can't ftp scripts in ASCII mode.
When we wanted to copy huge scripts (shell scripts, sql scripts , ..etc) from our Windows based laptop... (6 Replies)
Discussion started by: kraljic
6 Replies
8. UNIX for Dummies Questions & Answers
Legends,
Can you please help me in following.
I need to comment lines from “/tmp/a.txt” from the line A to line B through the command prompt only.
Please use variables not direct values like 2 or 5
It can be done with VI editor but it's not matches with my requirement (: 2,5 s/^/#/g).
... (1 Reply)
Discussion started by: sdosanjh
1 Replies
9. Shell Programming and Scripting
Dear all,
i am having text file like below
surya
rama
ranga
laxman
rajesh
reddy
i want add string (OK) before a text from line 3 to 5
the result will be
surya
rama
OK ranga
OK laxman
OK rajesh
reddy (1 Reply)
Discussion started by: suryanarayana
1 Replies
10. Shell Programming and Scripting
Hi,
I need to delete all lines in the file using vi editor which start with word aternqaco.
Please assist.
aternqaco.__oracle_base='/amdbqa01/app/oracle'#ORACLE_BASE set from environment
aternqa.__oracle_base='/amdbqa01/app/oracle'#ORACLE_BASE set from environment... (3 Replies)
Discussion started by: Vishal_dba
3 Replies
ex(1) General Commands Manual ex(1)
Name
ex, edit - text editor
Syntax
ex [ - ] [ -v ] [ -x ] [ -t tag ] [ -r ] [ +command ] [ -l ] name...
edit [ ex options ]
Description
The editor is the root of a family of editors: and The editor is a superset of with the most notable extension being a display-editing
facility. Display-based editing is the focus of
The name argument indicates the files to be edited.
Options
- Suppresses all interactive-user feedback. This option is useful in processing editor scripts in command files.
-v Equivalent to using rather than
-t Equivalent to an initial tag command, that is, editing the file containing the tag and positioning the editor at its definition.
-r Used to recover after an editor or system crash. It recovers by retrieving the last saved version of the named file. If no file is
specified, it displays a list of saved files.
-R Sets the read-only option at the start.
+command
Indicates that the editor should begin by executing the specified command. If the command is omitted, it defaults to $, positioning
the editor at the last line of the first file, initially. Other useful commands here are scanning patterns of the form +/pattern or
line numbers.
-l Sets up for LISP. That is, it sets the showmatch and lisp options. The -x option is available only if the Encryption layered product
is installed.
-x Causes to prompt for a key. The key is used to encrypt and decrypt the contents of the file. If the file contents have been encrypted
with one key, you must use the same key to decrypt them.
Restrictions
The command causes all marks to be lost on lines changed and then restored if the marked lines were changed.
The command does not clear the buffer modified condition.
The z command prints a number of logical rather than physical lines. More than a screenful of output may result if long lines are present.
File input/output errors do not print a name if the command line minus sign (-) option is used.
There is no easy way to do a single scan ignoring case.
The editor does not warn you if you place text in named buffers and do not use it before exiting the editor.
Null characters are discarded from input files, and cannot appear in output files.
Files
/usr/lib/ex?.?recover recover command
/usr/lib/ex?.?preserve preserve command
/etc/termcap terminal capabilities
~/.exrc editor startup file
/tmp/Exnnnnn editor temporary
/tmp/Rxnnnnn named buffer temporary
/usr/preserve preservation directory
See Also
awk(1), ed(1), grep(1), sed(1), vi(1), termcap(5), environ(7)
"Edit: A Tutorial" and the "Ex Reference Manual" in the
Supplementary Documents, Volume 1: General User
ex(1)