10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
We have the data looks like below in a log file.
I want to generat files based on the string between two hash(#) symbol like below
Source:
#ext1#test1.tale2 drop
#ext1#test11.tale21 drop
#ext1#test123.tale21 drop
#ext2#test1.tale21 drop
#ext2#test12.tale21 drop
#ext3#test11.tale21 drop... (5 Replies)
Discussion started by: Sanjeev G
5 Replies
2. Shell Programming and Scripting
hi
i need to extract lines from multiple files to a csv file.
for example, i have these 3 files
file1.txt
date:29dec1980
caller:91245824255
called:8127766
file2.txt
date:11apr2014
caller:9155584558
called:8115478
file3.txt
date:25jun2015
caller:445225552
called:8117485 (30 Replies)
Discussion started by: lp.descamps
30 Replies
3. UNIX for Dummies Questions & Answers
I need help extracting specific lines in a text file. The file looks like this:
POSITION TOTAL-FORCE (eV/Angst)
-----------------------------------------------------------------------------------
1.86126 1.86973 1.86972 ... (14 Replies)
Discussion started by: captainalright
14 Replies
4. Shell Programming and Scripting
Hi..Can anyone suggest a simple way of achieving this. I have several files which ends with extension .vcf . I will give example with two files
In the below files, we are interested in
File 1:
38 107 C 3 T 6 C/T
38 241 C 4 T 5 C/T
38 247 T 4 C 5 T/C
38 259 T 3 C 6 T/C... (8 Replies)
Discussion started by: empyrean
8 Replies
5. UNIX for Dummies Questions & Answers
Is there a way to read how many times each result occurs in a list,
say the list.txt has the results:
a
c
d
a
f
c
a
d
e
and I need to know how many times each of them occurs such as :
a=3
c=2
..etc. (5 Replies)
Discussion started by: Iifa
5 Replies
6. Shell Programming and Scripting
I apologize for the title but I am not even sure myself what to call this. I am going to use an example of a pizza delivery. I need to make an interactive script that allows users to order a certain number of pizzas, and then choose what they want on each pizza. Here is my code so far....
... (1 Reply)
Discussion started by: cstadnyk1
1 Replies
7. Shell Programming and Scripting
hey mates,
I was wondering if someone could assist me with this one, I have couple scripts that I would like to invoke from .sh ( One after another )
Script1
Script2
Script3
Is it possible to run script 2 after script one finished running ? And again start script 3 after script 2... (6 Replies)
Discussion started by: NDxiak
6 Replies
8. Shell Programming and Scripting
Hi,
I wrote a awk line here:
awk 'BEGIN {OFS="\t"} {print $0, int(rand()*($2-$1 + 1) + $1) }' filename
Basically what it does is that it takes the start (column 1) and stop (column 2) and generates a random # in between start and stop.
I want to take this a step further and have it... (2 Replies)
Discussion started by: phil_heath
2 Replies
9. Shell Programming and Scripting
Hi all,
I have a requirement where i have to read multiple files using Shell Script in Korn Shell.
each file will have the 3rd line as the amount field, i have to read this amount field and sum it for all the files.
any idea on how to achieve this?? (i think i can achieve it using a loop,... (9 Replies)
Discussion started by: nvuradi
9 Replies
10. Shell Programming and Scripting
I am developing a script to automate Global Mirroring on IBM DS8100's. Part of the process is to establish a global copy and wait until the paired LUN's Out of Sync tracks goes to zero. I can issue a command to display the ouput and am trying to use AWK to read the appropriate field. I am... (1 Reply)
Discussion started by: coachr
1 Replies
FORK(2) System Calls Manual FORK(2)
NAME
fork - create a new process
SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
pid_t fork(void)
DESCRIPTION
Fork causes creation of a new process. The new process (child process) is an exact copy of the calling process except for the following:
The child process has a unique process ID.
The child process has a different parent process ID (i.e., the process ID of the parent process).
The child process has its own copy of the parent's descriptors. These descriptors reference the same underlying objects, so that,
for instance, file pointers in file objects are shared between the child and the parent, so that an lseek(2) on a descriptor in the
child process can affect a subsequent read or write by the parent. This descriptor copying is also used by the shell to establish
standard input and output for newly created processes as well as to set up pipes.
The child starts with no pending signals and an inactive alarm timer.
RETURN VALUE
Upon successful completion, fork returns a value of 0 to the child process and returns the process ID of the child process to the parent
process. Otherwise, a value of -1 is returned to the parent process, no child process is created, and the global variable errno is set to
indicate the error.
ERRORS
Fork will fail and no child process will be created if one or more of the following are true:
[EAGAIN] The system-imposed limit on the total number of processes under execution would be exceeded. This limit is configuration-
dependent. (The kernel variable NR_PROCS in <minix/config.h> (Minix), or <minix/const.h> (Minix-vmd).)
[ENOMEM] There is insufficient (virtual) memory for the new process.
SEE ALSO
execve(2), wait(2).
3rd Berkeley Distribution May 22, 1986 FORK(2)