Extract a number from a line in a file and sed in another copied file
Dear all,
I am trying to extract a number from a line in one file (task 1), duplicate another file (task 2) and replace all instances of the strings 300, in duplicated with the extracted number (task 3). Here is what I have tried so far:
temperatures file:
nvt.mdp file
The result is that I get copies of nvt_1.mdp to nvt_3.mdp correctly, however, I obtain only one copy from task 3 and it is not even named correctly ie. 1_nvt.mdp is only .mdp.
In addition, since the sed command extracts a string from the line, it also extracts with it the line-break "character", changing the formatting of .mdp file.
I realized that if I were to convert the extracted number into an integer it should in theory work to prevent the format change of task 3 files. Though typset -i before Task 1 command gives the error:
")syntax error: invalid arithmetic operator (error token is "
If anyone could help with the proper implementation of task 3 such that formatting of $k_nvt.mdp is not changed and the proper number of copies are generated, I would be very grateful.
Cordially,
Ali
Last edited by Franklin52; 12-12-2010 at 08:46 AM..
Reason: Please use code tags
Hi,
I have to update last line of a text file with the number of lines in that file. This last line will have text such as 0.0000 and I should replace this with number lines. If lines are 20 then it should be replaced with 00020. Any sed or awk cmd help would be appreciated (3 Replies)
I have a shell script and want to assign a value to a variable. The value is the line exctrated from a file using the line number. The line number it is not fix, and could change any time.
I have tried sed, awk, head .. See my script
# Get randome line number from the file
#selectedline = `awk... (1 Reply)
Hello,
I am having trouble extracting a specific line from a file when the line number is known. My first attempt involved grep -n 'hi' (the word 'hi will always be there) to get the line number before the line that I actually want (line 4).
Extra Notes:
-I am working in a bash script.
-The... (7 Replies)
Hi
I want to extract certain text between two line numbers like
23234234324 and
54446655567567
How do I do this with a simple sed or awk command?
Thank you.
---------- Post updated at 06:16 PM ---------- Previous update was at 05:55 PM ----------
found it:
sed -n '#1,#2p'... (1 Reply)
I Have file1 with below lines :
#HostNameSelection=0 :NotUsed
#HostNameSelection=1 :Automatic
#HostNameSelection=3 :NotForced
I have file2 which has similar lines but with different values
I want to copy the changes from file1 to file2 ,line by line only if line begins with '#'.
for... (7 Replies)
Hi,
I search all forum, but I can not find solutions of my problem :(
I have multiple files (5000 files), inside there is this data :
FILE 1:
1195.921 -898.995 0.750312E-02-0.497526E-02 0.195382E-05 0.609417E-05
-2021.287 1305.479-0.819754E-02 0.107572E-01 0.313018E-05 0.885066E-05
... (15 Replies)
I have 1 file that has elements as follows. Also the CVR(10) and the word "SAUCE" only appear once in the file so maybe a grep command would work?
file1
CVR( 9) = 0.385E+05, ! VEHICLE
CVR(10) = 0.246E+05, ! SAUCE
CVR(11) = 0.162E+03, ! VEHICLE
I need to extract the... (6 Replies)
Sed command to replace a line in a file using line number from the output of a pipe.
Is it possible to replace a whole line piped from someother command into a file at paritcular line...
here is some basic execution flow..
the line number is 412
lineNo=412
Now i have a line... (1 Reply)
Ok .. This is driving me nuts. I suppose I need another set of eyes.
Example Data
interface Vlan1
description xxxxxxxxxxxx
ip address 192.168.1.1 255.255.255.252
no ip redirects
no ip proxy-arp
ip flow ingress
ip pim sparse-mode
load-interval 30
!
interface Vlan2
... (5 Replies)
Discussion started by: popeye
5 Replies
LEARN ABOUT DEBIAN
iv_task_register
iv_task(3) ivykis programmer's manual iv_task(3)NAME
iv_task_register, iv_task_unregister, iv_task_registered - deal with ivykis tasks
SYNOPSIS
#include <iv.h>
struct iv_task {
void *cookie;
void (*handler)(void *);
};
void IV_TASK_INIT(struct iv_task *task);
void iv_task_register(struct iv_task *task);
void iv_task_unregister(struct iv_task *task);
int iv_task_registered(struct iv_task *task);
DESCRIPTION
The functions iv_task_register and iv_task_unregister register, respectively unregister, a task with the current thread's ivykis event
loop. iv_task_registered on a task returns true if that task is currently registered with ivykis.
A task is like a timer, but with an immediate timeout. When a task is registered, unless it is unregistered again first, the callback
function specified by ->handler is guaranteed to be called once, in the thread that the task was registered in, some time after control
returns to the ivykis main loop but before ivykis will sleep for more events, with ->cookie as its first and sole argument. When this hap-
pens, the task is transparently unregistered.
Tasks are mainly used for scheduling code for execution where it is not appropriate to directly run that code in the calling context (for
example, because the current context might be run as a callback function where the caller expects certain conditions to remain invariant
after the callback completes).
The application is allowed to change the ->cookie and ->handler members at any time.
A given struct iv_task can only be registered in one thread at a time, and a task can only be unregistered in the thread that it was regis-
tered from.
There is no limit on the number of tasks registered at once.
See iv_examples(3) for programming examples.
SEE ALSO ivykis(3), iv_examples(3)ivykis 2010-08-15 iv_task(3)