Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Difference between $var and ${var}
Top Forums UNIX for Dummies Questions & Answers Difference between $var and ${var} Post 302455604 by citaylor on Wednesday 22nd of September 2010 04:25:20 AM
Old 09-22-2010
They are generally interchangable, however the curly braces disambiguate the variable, so for example:
Code:
var="to the "
echo "Hello$varworld"
echo "Hello${var}world"

Would return two different responses from the two echo statements as the first would attempt to echo the contents of the variable "varworld" which doesnt exist and is therefore empty. The second echo will work as designed.

I hope this makes things clearer.
This User Gave Thanks to citaylor For This Post:
dashing201
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Difference between "set $<var>" and "set -- $<var>"

Hi pros, Could anyone tell me the actual difference between setting the positional parameters from the variable using the following commands? $ var="This is my question" $ set $var $ echo $1 --> 'This' $ echo $2 --> 'is' .... .... and $ var="This is my question" $ set --... (3 Replies)
Discussion started by: royalibrahim
3 Replies

2. Solaris

diff b/w /var/log/syslog and /var/adm/messages

hi sirs can u tell the difference between /var/log/syslogs and /var/adm/messages in my working place i am having two servers. in one servers messages file is empty and syslog file is going on increasing.. and in another servers message file is going on increasing but syslog file is... (2 Replies)
Discussion started by: tv.praveenkumar
2 Replies

3. Solaris

Difference between dmesg and /var/adm/messages?

Can anyone explain me the difference between difference between dmesg and /var/adm/messages in solaris. I tried to find out the difference but I didn't get much info on that. As per my knowledge both are used to check the logs.. (3 Replies)
Discussion started by: rogerben
3 Replies

4. UNIX for Advanced & Expert Users

/var/adm/messages vs /var/log/messages

The /var/adm/messages in Solaris seem to log more system messages/errors compared to /var/log/messages in Linux. I checked the log level in Linux and they seem OK. Is there any other log file that contains the messages or is it just that Linux doesn't log great many things? (2 Replies)
Discussion started by: gomes1333
2 Replies

5. Solaris

Lost /var/sadm/install/contents file and /var/sadm/pkg

Hello, I recently found that my /var/sadm/install/contents, ~/admin/default, /var/spool/patch and /var/spool/pkg files were empty. This broke the pkginfo, pkgchk and other package related tools. The pkgmap no longer points to where the applications have been installed. I have replaced the... (0 Replies)
Discussion started by: ronin42
0 Replies

6. Solaris

/var/adm & /var/sadm

what is the difference between tha /var/adm and /var/sadm files in solaris 10 Os please can any one respond quickly thanking you (2 Replies)
Discussion started by: wkbn86
2 Replies

7. Solaris

Difference between /var/log/syslog and /var/adm/messages

Hi, Is the contents in /var/log/syslog and /var/adm/messages are same?? Regards (3 Replies)
Discussion started by: vks47
3 Replies

8. Solaris

/Var

Hi, Please suggest me how to clear the /Var if it exceeds threshold limit, and what factors need to be considered while clearing it. Thanks!! (2 Replies)
Discussion started by: Laxxi
2 Replies

9. Shell Programming and Scripting

Csh , how to set var value into new var, in short string concatenation

i try to find way to make string concatenation in csh ( sorry this is what i have ) so i found out i can't do : set string_buff = "" foreach line("`cat $source_dir/$f`") $string_buff = string_buff $line end how can i do string concatenation? (1 Reply)
Discussion started by: umen
1 Replies

10. Shell Programming and Scripting

Transfer the logs being thrown into /var/log/messages into another file example /var/log/volumelog

I have been searching and reading about syslog. I would like to know how to Transfer the logs being thrown into /var/log/messages into another file example /var/log/volumelog. tail -f /var/log/messages dblogger: msg_to_dbrow: no logtype using missing dblogger: msg_to_dbrow_str: val ==... (2 Replies)
Discussion started by: kenshinhimura
2 Replies

LEARN ABOUT DEBIAN

snnewgroup

snnewgroup.v0.3.8(8)					      System Manager's Manual					      snnewgroup.v0.3.8(8)

NAME

       snnewgroup - create a new sn newsgroup

SYNOPSIS

       snnewgroup newsgroup [server] [port]

DESCRIPTION

       snnewgroup creates newsgroup assigning it an upstream NNTP server of server:port.  If port is not specified, defaults to 119.  If server is
       also not specified, newsgroup is created as a local group which is fed only by articles POSTed to it.

       You will need to be root or own /var/spool/sn in order to add new groups.

ENVIRONMENT VARIABLES

       SNROOT If this is set and is not empty, the value is used in place of /var/spool/sn, the default news spool directory.

FILES CREATED

       /var/spool/sn/newsgroup
	      Directory where articles will be stored.

       /var/spool/sn/newsgroup/.created
	      Empty file for the newsgroup creation time.

       /var/spool/sn/newsgroup/.serial
	      Where snget gets its idea of the new starting serial number for newsgroup on server server:port.	The value is initialized to 0.

       /var/spool/sn/newsgroup/.outgoing
	      If server is specified, is a symlink to  /var/spool/sn/.outgoing/server:port, which is a directory, created if it does  not  already
	      exist.  If server is not specified, no file /var/spool/sn/newsgroup/.outgoing will be created.  See also snsend.

SEE ALSO

       sndelgroup, snsend

N.B.								    Harold Tay						      snnewgroup.v0.3.8(8)
All times are GMT -4. The time now is 09:36 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy