Newline in my script-built shell variable


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Newline in my script-built shell variable
# 15  
Old 06-07-2011
Well, that looks like you have no DHCP assigned IP yet. No loopback, either! Weird!

Last edited by DGPickett; 06-07-2011 at 12:51 PM..
# 16  
Old 06-07-2011
I never have DHCP assigned IPs. My ISP uses DHCP to assign my router a real IP, but inside the premises I am lord almighty of the network.

You're right about loopback though. I didn't notice that before. I'll have to check into that.

---------- Post updated at 07:26 PM ---------- Previous update was at 06:57 PM ----------

Quote:
Originally Posted by DGPickett
No loopback, either! Weird!
I think I remember loop addresses previously being included in the output of netstat -nr, but I just checked, and it's not included in any of the 4 Linux boxes I have running right now (2 Fedora, 1 Ubuntu and 1 Arch). Yet I can ping and ssh to localhost on each.

I must not have been paying attention when it became implicit on Linux.
# 17  
Old 06-08-2011
Windows has routing to push all local IPs to loopback, so I guess this is a step in the other direction. The IP stack can deal with loopback and hide it from routing. On Solaris and HP-UX I always see it. Well, not the most portable thing. Even ping output varies a lot. It's a shame they cannot get their act together on one set of network commands and facilities, consistent presentations! I was not amused when they overloaded the routing table with path MTU. At least HP seems to does it with less clutter than I recall on Solaris.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Converting shell to Perl I run into shell built in function trap and need alternative in Perl

I am working on converting shell to Perl script. In shell we have built in function trap Do you know alternative in Perl or actually we don't need it? Thanks for contribution (3 Replies)
Discussion started by: digioleg54
3 Replies

2. Shell Programming and Scripting

Unable to pass shell script variable to awk command in same shell script

I have a shell script (.sh) and I want to pass a parameter value to the awk command but I am getting exception, please assist. diff=$1$2.diff id=$2 new=new_$diff echo "My id is $1" echo "I want to sync for user account $id" ##awk command I am using is as below cat $diff | awk... (2 Replies)
Discussion started by: Ashunayak
2 Replies

3. Shell Programming and Scripting

SH script, variable built command fails, but works at command line

I am working with a sh script on a solaris 9 zone (sol 10 host) that grabs information to build the configuration command line. the variables Build64, SSLopt, CONFIGopt, and CC are populated in the script. the script includes CC=`which gcc` CONFIGopt=' --prefix=/ --exec-prefix=/usr... (8 Replies)
Discussion started by: oly_r
8 Replies

4. UNIX for Dummies Questions & Answers

newline character in a variable

variable="unix\nlinux" echo $variable expected output: unix linux :wall: can i do that ?? thanks in advance!! (3 Replies)
Discussion started by: sathish92
3 Replies

5. Shell Programming and Scripting

How can I add a newline In a text file using Shell Script

Good day ... Well i do have this project in school, in our Principles Of Operating System Class We are using Cygwin.... And our project goes like this... Create a dictionary using cygwin. Display the following menu at the start of execution 1-add a word in the dictionary # specify the... (1 Reply)
Discussion started by: kpopfreakghecky
1 Replies

6. UNIX for Dummies Questions & Answers

How can I add a newline In a text file using Shell Script

Good day ... Well i do have this project in school, in our Principles Of Operating System Class We are using Cygwin.... And our project goes like this... Create a dictionary using cygwin. Display the following menu at the start of execution 1-add a word in the dictionary # specify... (1 Reply)
Discussion started by: kpopfreakghecky
1 Replies

7. Shell Programming and Scripting

awk built-in variable for input file

Hi guys, Does awk have a built-in variable which I can use to display the input file it's currently reading? I'm currently concatenating multiple files using awk and later on do some parsing. But for now, I want to add an extra column in the main output data file - basically putting in the... (3 Replies)
Discussion started by: Det7
3 Replies

8. UNIX for Advanced & Expert Users

Variable assignments specified with eval shell built-in

According to the POSIX specifications eval is a special shell built-in, which should imply that variable assignments specified together with it should remain in effect after the built-in completes. Thus one would expect IFS to be changed after this: var=$'a\nb c' $ IFS=$'\n' eval ' for i in... (4 Replies)
Discussion started by: Scrutinizer
4 Replies

9. UNIX for Dummies Questions & Answers

built in variable to hold the name of therunning script...

Hi, I have multiple functions that can be called by any shell script. These functions have inbuilt echo statements to logs their activity into a log file. When I run multiple shell scripts that call these functions, they all log into the same log file and I am not able to differentiate which... (2 Replies)
Discussion started by: new_learner
2 Replies

10. UNIX for Dummies Questions & Answers

Running Built-ins in current shell

Hi, Can any one please describe why I am not able to run any built-in commands in current shell? Thanks. (5 Replies)
Discussion started by: siba.s.nayak
5 Replies
Login or Register to Ask a Question