General :: Shell Script Variable Usage ?
Feb 9, 2010Having real problem with below:
If I do:
I get the result I want (a file in format of <name><yyyy>-<mm>-<dd>.zip cut down to just yymmdd); but not if I try to set it as a variable ...
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Programming :: Assign Value Of C Variable To Shell Variable?
Apr 28, 2010included shell script inside c program, and i wanted to assign the value of c variable to shell variable..Can any one please suggest me how to do it?
View 8 Replies View RelatedGeneral :: Shell Script -- Awk Variable Substitution?
Oct 7, 2010I have a script in which I'm reading a file line by line and I'm finding certain position value using awk index as
Code:
# 2 spaces before open parens
pos=`echo | awk -v Line="$Line" '{ print index("'"$Line"'"," (")}'`
[code]....
General :: Environment Variable And Current Shell
May 24, 2010I am using Red Hat Linux Enterprise 5. I know the theory that -- using export to set environment variable, the environment variable will apply to current and child environment, but without using export to set environment variable, the environment variable will only apply to the current environment. What is the exact definition of "child environment" and "current environment"? For example,
Code:
$ var1=123
$ echo "Hello [$var1]"
The value of var1 (which is 123) is printed in shell, but I think echo is a command invoked by current shell, and it (the echo command) should be a child environment of current shell and the value of var1 should not (because not using export var1=123) impact echo.
General :: Assigning Value To A Variable In Shell Script?
Nov 22, 2010Why doesn't "var1=`echo $var2 | grep pattern`" work ?
View 8 Replies View RelatedGeneral :: Variable Declaration In Shell Scripts?
Feb 4, 2010We have a file that declares many environmental variables. Out of which I have doubt on few. These variables are declared in UNIX environment. We are planing to migrate them along with applications to Linux.
Code:
export MAILSERVER="%new@hub"
MAIL_USERS="vinay.new"{MAILSERVER}",vijay.new"{MAILSERVER}
Does the above declarations work in Linux ?
The above declarations expands to
Code:
mail vinay.new%new@hub,vijay.new%new@hub
which looks little wierd.
[Code]...
Software :: Export A Variable To Parent Shell In Shell Scripting?
May 21, 2009Is there a way to export a variable to parent shell in shell scripting ?
View 3 Replies View RelatedGeneral :: Existence Of USER Environment Variable In The Shell?
Jan 28, 2010I heard (although I can't find any sources for proof) that the USER environment variable may not be set in a old Unix shells (maybe even some obscure shells as well). What is the probability that it won't be set?
View 2 Replies View RelatedGeneral :: Storing A Variable In A Shell Script After Awk Output?
Feb 8, 2010On command line I have no problem storing a variable e.g
Code:
:~/bin$ process=`ps -ef | awk ' $8 == "idesk" { print $2 }'`
:~/bin$ echo $process
26736
:~/bin$
When I try to incorporate this into a shell script I get a blank.
Code:
:~/bin$ cat process_idesk
#!/bin/bash
process=`ps -ef | awk ' $8 == "idesk" { print $2 }'`
[code]....
The process_idesk script has been chmoded to be executable by the user. I'm sure there must be a silly omission on my behalf.
General :: Shell Script - Use Variable In A For Loop With Directory Path?
Jan 19, 2011I modified files in several directories, and need to run a diff on the backup I created before modifying the file.
I'm trying to compose a simple shell script to speed up the task, but getting a syntax error.
Here is what I have:
for i in DIR1 DIR2 DIR3 DIR4 DIR5 do;
diff /maindir/subdir/subdir/$i/filename.txt.old /maindir/subdir/subdir/$i/filename.txt;
done
I know the paths are valid, and if I run just the diff command with the actual DIR1 instead of $i it works.
General :: Shell Script Is Showing Error After Whenever Checking A Special Variable
May 29, 2011I have created a shell script to customise mv command, now i have achieved to accomplish all the functionality of mv by using alias. But i found difficulty in accomplish the funcionality with options [Like mv -i or mv -f etc.]. I thought about logic which check the first argument whether its starting with a minus [-] or not. if its starting with argument it will set a flag and execute accordingly. But whenever this condition is checked it shell script will throw error of destination operand missing. But the same will work with out option.
Note: I have used an minus[-] expression for decreasing a counter on the script above. The below mentioned is the portion of script. Sry for troubling Im not gud @scripting.
for i in $*
do
{
argument=`expr $argument - 1`
if [ $argument = 0 ];
then
exit
[Code]....
Programming :: Can Awk Take A Shell Variable
Jul 23, 2010I have been searching most of today and am stuck on getting a variable into an awk portion of my bash script. I have this working:
Code:
#!/bin/sh
SRC=/var/log/mail.log
DEST=/var/www/output/myFile.txt
VAR=userName@myDomain.tld
[code]....
Can awk take a shell variable? Or do I have to do something completely different?
Ubuntu :: Shell: Dirname With Variable As Parameter?
Jul 31, 2010Code:
a=/this/is/a/dir.txt
dirname $a
[code]....
Programming :: Assigning A Variable For Later Use In Shell Script ?
May 4, 2010Using things like awk/sed, but have managed to cobble together what I needed so far without a problem. The only thing I'm struggling with is to assign the content of a particular line as a variable, and then to use it again throughout the file.
For example, if what I want is the first line of the file to become the variable "from1", and then to replace the word "Subject" in the file with the string "Message from [from1]". What I thought would work
I tried a few diff combinations but nothing seems to work. All I get is the terminal hanging indefinitely.
Server :: Difference Between CGI And SHELL Environment Variable?
Sep 8, 2009I have a application on linux , I can excute it in command line . but when I invoked it via CGI(perl) , it can not excute successfully , so I suspected that there is something different between SHELL and CGI environment , but I haven't figure out what the difference is .
View 3 Replies View RelatedProgramming :: How To Pass Sed Address By Shell Variable
Aug 2, 2011Code...
I am somewhat confident that there is a neater way.
Question: Does anybody know the answer?
Programming :: Pass A Shell Variable To An AWK Command?
Dec 23, 2010I have the following code :
Code:
E_BADARGS=65
if [ $# -ne 2 ] ; then
[code]...
Programming :: Pass Variable From One Shell Script Into Another
Oct 2, 2009I have some messy code that I wrote a while back and I am trying to organize it. The program opens xpaint and uses xwit and xte to draw packman and so on. I want to split it all up I am going to add more to it. Basically like i would want drawing packman in one function i guess you could call it and then coloring him or the background in another
<code>
#!/bin/bash
pkill xpaint
res=`xwininfo -root | grep geom | sed -e 's/^.*try ([0-9][0-9]*x[0-9][0-9]*)+.*$/1/'`
Xoriginal=`echo $res | cut -d 'x' -f 1`
Yoriginal=`echo $res | cut -d 'x' -f 2`
X=`echo "($Xoriginal/2)-400" | bc `
Y=`echo "$Yoriginal/2" | bc `
#t=$(($Y/2))
bob=`echo "$Y/2" |bc `
echo $X
echo $Y
/usr/bin/xpaint -size "$Xoriginal"x"$Yoriginal" -popped &
sleep 4
paintersMom=`xwit -all -print | grep XP | cut -d ":" -f 1`
canvasWin=`xwit -all -print | grep Untitled | cut -d ":" -f 1`
#toolres=`xwininfo -id $paintersmom | grep geom | sed -e 's/^.*try ([0-9][0-9]*x[0-9][0-9]*)+.*$/1/'`
#canres=`xwininfo -id $canvasWin | grep geom | sed -e 's/^.*try ([0-9][0-9]*x[0-9][0-9]*)+.*$/1/'`
#echo $paintersMom
xwit -id $paintersMom -move 0 0
xwit -id $canvasWin -move 0 0
xwit -root -warp "$X" "$Y"
sleep 4
for((i=45; i < 315; i++))
do
xte 'mousedown 1'
ang=`./deg2rad $i`
movex=`echo "$X+$bob*c($ang)" | bc -l`
movey=`echo "$Y+$bob*s($ang)" | bc -l`
xwit -root -warp "$movex" "$movey"
done
xwit -root -warp "$X" "$Y"
xte 'mouseup 1'
#xwit -id $paintersMom -focus -raise
#sleep 1
#xwit -id $paintersMom -warp 30 390 #// fill in command on tool bar
#sleep 1
#xte 'mouseclick 1'
#sleep 1
#xwit -id $canvasWin -warp 221 40 #// color selection
#sleep 1
#xte 'mouseclick 1'
#sleep 1
#xwit -id $canvasWin -warp "$(($X-150))" "$Y" #//location on pac man
#sleep 1
#xte 'mouseclick 1'
#sleep 1
#xwit -id $canvasWin -warp 62 44 #// selecting color black
#sleep 1
#xte 'mouseclick 1'
#sleep 1
#xwit -root -warp 62 120 #// selecting back to canvas
#sleep 1
#xte 'mouseclick 1' #// color canvas black
#sleep 1
#xwit -id $paintersMom -focus -raise
#xwit -id $paintersMom -warp 27 108 #//click back to pencil
#sleep 1
#xte 'mouseclick 1'
#sleep 1
</code>
Here for example $paintersmom is would be in the drawing of pacman but I would also want to use it when I colored him in.. but I would want both processes in a different shell script.
Programming :: Debugging Shell Script With A Variable Expansion?
Jan 20, 2011What I am trying to accomplish is a way to read only the lines that have been added to the file mylog0 since the last time the script looped (5 seconds). I am open to new suggestions too, I have been stuck on this little script for a few hours already.
Code: #!/bin/bash
i=0
firstline=0
[code]...
Software :: Bash Shell - Export A Variable From A Script?
Jun 24, 2010I need to be able to set a variable that is used by my build environment. I need to be able to change this variable "on the fly" as I work with multiple build environments. A portion of the variable is arbitrary, so I need to treat the arbitrary portion of the variable as an argument.
I would normally just create an alias, but BASH doesn't support arguments to aliases. So the workaround for the no-alias-arguments bug is to use a script. No problem. Except the variable I set in the script does not exist when I exit the script.Now, if I run the script by using "$ . myscript" it works in that the variable is set after it exits. The problem is the argument checking I have in the script doesn't work anymore. BASH aliases don't support arguments and I can't export a variable from a script unless I source the script (is it even a script at that point?) Maybe I am simply taking the wrong approach.
Programming :: Grep - Include Glob With Shell Variable
Nov 10, 2010Code:
grep -r $SEARCHDIR --include="day_$YYYY-$MM-*" -h -o -e PATTERN
The above command does exactly what I want: limit the search of files in $SEARCHDIR to those specified by --include.
I use double quotes rather than single quotes because of the shell variables. I would have thought this would cause the shell to expand the "*" but this doesn't seem to be the case.
Programming :: Loops In Bash Shell Or Variable Math?
Oct 28, 2010I am trying to map the coordinates of a grid.
Code:
R=7 # number of rows (lines)
C=6 # number of columns
X=200 # initial horizontal location
Y=100 # initial vertical location
[code]....
Programming :: Shell To Remove Line Matched With Variable?
Jul 25, 2011I'm using sed to remove certain line in a text file based on a match with 2 variables from input. Here is how it looks like in file
Philip S:Odds:45:343
Mike Junior:Odds:3:56
I prompt for 2 inputs in variable form which is compared to the first 2 fields of the above text (: seperated). So say i enter Philip S and Odds then it should delete the entire first line.
General :: Status Of Memory Usage And Disk Usage Using Sigar In Windows And Ubuntu
Mar 15, 2010I was trying to get the status of memory usage and disk usage using sigar in windows and ubuntu. done this in windows by just copying the sigar library into jdk library. But i was unable to do so in ubuntu. I've copied the library to java-6-sun library but still can't run the program.
View 14 Replies View RelatedGeneral :: Unix - Monitor Average CPU Usage And RAM Usage On One Process System?
Nov 15, 2010Is there any way to monitor one process' CPU usage and RAM usage over time on Linux? I am trying to change to a cheaper VPS and need to work out what level of CPU and RAM I need!
View 2 Replies View RelatedProgramming :: Checking Shell Script Variable Contain Numeric Data
Mar 28, 2009I need to check whether a shell script variable contains non-zero numeric data to proceed. The variable should contain numeric values, but may in fact contain zeroes, blank space or nothing. So far, I have tried various combinations of:
Code:
if test $variable
then
if test $variable -gt 0
then
echo "good data exists"
else "no good data exists"
fi
fi
It partially works, but I get either "too many arguments" or "integer expression expected".
Ubuntu :: Correct Usage Of Perl Expression In 'rename'-shell Command
Jan 21, 2011I want to rename some files in one directory and found the command 'rename' most appropriate.
Changing the file extension is easy since there are lot of examples for this.
But now I want to rename my files like this:
'somePrefix_blablabla.ext' --> '0_blablabla.ext'
'somePrefix_blablablablabla.ext' --> '0_blablablablabla.ext'
I DON'T want an incrementation, just the leading prefix '0_'
correct perl expression syntax for this?
General :: Assign Local Variable Values To Global Variable?
Feb 17, 2011how to assign a local variable value to a global variable....
View 2 Replies View RelatedGeneral :: Create An Environment Variable With The PRINTER Variable?
Apr 16, 2011I am supposed to create an environment variable with the PRINTER variable, which should resolve to the word sales. Would the command be like this?: env PRINTER - NAME=SALES (is this the command to create that variable with resolving the word sales to it?)
View 3 Replies View RelatedDebian Multimedia :: Conky Execp / Execpi To Parse Output Of Scroll Variable Generated From Shell Or PHP Scripts
Sep 11, 2015I am having a hard time getting conky execp/execpi to correctly parse output of the scroll variable generated from shell or PHP scripts.
Code: Select allDebian 8.0
Xfce 4.10
Conky 1.9.0-6
This is a simplified minimal conky configuration file used to show the same problem:
Code: Select allalignment bottom_middle
background no
border_width 1
default_color white
default_outline_color white
default_shade_color white
double_buffer yes
[Code] ....
Here is the output I'm getting:
Code: Select all ABC /*doesn't scroll, UNEXPECTED, shows 10 spaces before ABC*/
ABC --||--
abcdefghijklmnopABC /*doesn't scroll, WORKS AS EXPECTED as scroll length is 25 which is longer than text "abcdefghijklmnop" */
abcdefghijklmnopABC --||--
abcdefghijklmnopABC /*WORKS, everything before ABC scrolls 5 characters at a time*/