10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
i have a file seperated each line seperated by newline. For example
i am trying to replace the newlines to "," but dont want , present at the end of the line so i am trying the below one liner . but not sure whats wrong but its not working
cat myfile | tr -s '\n' ',' | sed... (9 Replies)
Discussion started by: chidori
2. Shell Programming and Scripting
Basically I was wondering if any of you know how to pipe the output of ls to a text file? so in my shell script one of the lines is ls but i want to pipe it into a file called directory listing.
I have tried ls | Directorylisting.txt
but it keeps saying " line 7: DirectoryListing.txt:... (9 Replies)
Discussion started by: LinuxNubBrah
3. Shell Programming and Scripting
Ok, so there is a perl script that runs as a server, on my local host. It tells me which port to use. I want to pipe that output into my browser so I can do the whole thing with a single command. The problem is, I think, that the program doesn't actually exit cause it's running a server, so...... (6 Replies)
Discussion started by: ninjaaron
I would like to pipe "top -n" to a text file, but I get an error:
top: cannot open /dev/kmem
kvm_open: Permission denied
I am a non-root user.
If I could find a way to get this type of output:
"Memory: 2048M real, 1516M free, 4099M swap free"
into a text file, I could further automate... (13 Replies)
Discussion started by: safraser
5. Shell Programming and Scripting
I am trying to convert the below Csh code into Perl.
But i have the following error.
Can any expert help ?
ls: *tac: No such file or directory
set $ST_file = `ls -rt *$testid*st*|tail -1`;
my $ST_file = `ls -rt *$testid*st*|tail -1`; (10 Replies)
Discussion started by: Raynon
6. Shell Programming and Scripting
I have a script like so:
if $downloadHow do I pipe the output of the php file into a variable, as when i run the if statement, it just echos the file output to the screen and does not actually consider the output (it will be... (2 Replies)
Discussion started by: daydreamer
7. Shell Programming and Scripting
Not sure why this does not work in bash:
tail -f err.log |&
-bash: syntax error near unexpected token `&'
I am attempting to continuously read a file that is being updated by doing a "tail -f" on the file and piping the output to stdin which can then be read by the next shell command
Thnx (4 Replies)
Discussion started by: anuramdas
8. Shell Programming and Scripting
I was wondering why ls * | echo does not print the contents of the directory to the screen? The way I see it, ls * returns a whole lot of information, and then we pipe all this info to echo, so surely it should all come to our screen!
Is there a serious flaw in my understanding?
... (3 Replies)
Discussion started by: A1977
9. UNIX for Dummies Questions & Answers
I did not understand why the following did not work out as I expected:
find . -name "pqp.txt" | grep -v "Permission"
I thought I would be able to catch whichever paths containing my pqp.txt file without receiving the display of messages such as "find: cannot access... Permisson... (1 Reply)
Discussion started by: 435 Gavea
10. Shell Programming and Scripting
Hi. Im using cat to output the contents of a file, then piping it to my while read loop.In this loop variables get assigned values. However when i try to use the variables outside the loop their values has been reset.I understand about subshells etc. but I have no idea how to "preserve" the... (3 Replies)
Discussion started by: Ultimodiablo