06-25-2008
Expanding shell variable
I have a question about expanding shell variables. Given the following piece of script:
a="Some text"
b="Other text"
for i in a b
do
string1=$i
echo $string1 --> returns 'a'
string2=EXPRESSION_WITH_$i
echo $string2 --> returns 'Some text'
done
What do I have to fill in for the text EXPRESSION_WITH_$i? So I would like to expand $i (equals to 'a') to $a
Thanks for your reply!
Ronald
Last edited by lonar; 06-25-2008 at 02:19 PM..
10 More Discussions You Might Find Interesting
1. AIX
Hi,
I have created the lun of 15gb and assigned to aix,but now I want to expand the size of lun 15gb to 30gb,
I am having following queries.
1)wheather i have to umount that partition on aix side before increasing the size of lun on storage side or directly I can increase directly size... (2 Replies)
Discussion started by: manoj.solaris
2 Replies
2. Shell Programming and Scripting
Hi !
I am making my first steps to make a script. Therefore i try to make a scp command more easier. Given is the following alias:
14='admin@x-abcd-def.xyz
Now i want to let the script read three var's from the console to use them in the script and then build the scp string.
echo... (7 Replies)
Discussion started by: locutus01
7 Replies
3. Linux
Hi all
I am testing backupPC as a backup solution for machines, as far as i knew, backuppc cannot combine more than storage from different slices so it have to be in one slice my question is, what is the easy way to offer a virtual logical drive expanded/expandable to backuppc, i mean i want to... (1 Reply)
Discussion started by: XP_2600
1 Replies
4. Solaris
I'm having a little trouble with a Solaris package build/install.
I have the following entries in my prototype file...
# Interfaces file - all versions installed and auto linked to installation type...
f none $OPTDIR/config/interfaces.DEV 0444 $OWNER $GROUP
f none... (0 Replies)
Discussion started by: JerryHone
0 Replies
5. Shell Programming and Scripting
Hi,
I am trying to do the following thing
var='date'
$var
Above command substitutes date for and in turn runs the date command and i am getting the todays date value.
I am trying to do the same thing as following, but facing some problems,
unique_host_pro="sed -e ' /#/d'... (3 Replies)
Discussion started by: gvinayagam
3 Replies
6. Solaris
our sparc server has only 1Gb RAM. Since RAM is not very expensive anymore, it seems like a good idea to upgrade it.
will it make server (and database on it) faster?
I hope it would less 'abuse' hard drive.. (6 Replies)
Discussion started by: orange47
6 Replies
7. Shell Programming and Scripting
Simple enough problem I think, I just can't seem to get it right.
The below doesn't work as intended, it's just a function defined in a much larger script:
CheckValues() {
for field in \
Group_ID \
Group_Title \
Rule_ID \
Rule_Severity \
... (2 Replies)
Discussion started by: Vryali
2 Replies
8. Shell Programming and Scripting
s=`awk '{ print $0}' /Applications/Relink.app/z_cloudline.txt`
sed -n '"$s"' /var/mobile/Library/iFile/Bookmarks.plist > /var/mobile/originalip.txt
What is the problem with that code ?
With variable it only outputs:
sed: -e expression #1, char 1: unknown command: `"'
If I use the... (3 Replies)
Discussion started by: pasc
3 Replies
9. Shell Programming and Scripting
Heyas
I'm trying to give some information on used variables.
While the first two work fine, the ones starting with a glob (is that the proper term?) fail.
echo ${!TUI_*} ${!RET_*} ${!*_CLI} ${!*\_GUI}
bash: ${!*_CLI}: bad substitution
Same with @ or have them escaped.
I found no... (2 Replies)
Discussion started by: sea
2 Replies
10. UNIX for Beginners Questions & Answers
I have also some difficulty calling sed to change a word in a file.
sed -i 's/docTitl/Outline ${docTitl}/g' $ofln
Moved to new thread, since it is a different question (3 Replies)
Discussion started by: Danette
3 Replies
tr(1B) SunOS/BSD Compatibility Package Commands tr(1B)
NAME
tr - translate characters
SYNOPSIS
/usr/ucb/tr [-cds] [ string1 [string2]]
DESCRIPTION
The tr utility copies the standard input to the standard output with substitution or deletion of selected characters. The arguments string1
and string2 are considered sets of characters. Any input character found in string1 is mapped into the character in the corresponding posi-
tion within string2. When string2 is short, it is padded to the length of string1 by duplicating its last character.
In either string the notation:
a-b
denotes a range of characters from a to b in increasing ASCII order. The character , followed by 1, 2 or 3 octal digits stands for the
character whose ASCII code is given by those digits. As with the shell, the escape character , followed by any other character, escapes
any special meaning for that character.
OPTIONS
Any combination of the options -c, -d, or -s may be used:
-c Complement the set of characters in string1 with respect to the universe of characters whose ASCII codes are 01 through 0377
octal.
-d Delete all input characters in string1.
-s Squeeze all strings of repeated output characters that are in string2 to single characters.
EXAMPLES
Example 1: Creating a list of all the words in a filename
The following example creates a list of all the words in filename1, one per line, in filename2, where a word is taken to be a maximal
string of alphabetics. The second string is quoted to protect `' from the shell. 012 is the ASCII code for NEWLINE.
example% tr -cs A-Za-z '