Hi, experts.
Whould anybody clear explay me difference and usage of these 3 commands (particulary in bash) :
exec
eval
source
I've tryed to read the manual pages but did not get much.
Also could not get something useful from Google search - just so much and so not exactly, that is... (3 Replies)
Hi,
I need to understand the following script:
a=`dirname $0`
b=`uname -s`
if ; then
c=$a/../../../platforms/$b/extlib
else
c=`pwd`/$a/../../../platforms/$b/extlib
fi
There are a bunch of variable assignments going on here!!!
What does this variable means: "${a:0:1}"
... (2 Replies)
I do not claim to be an expert, but I have done things with scripts that whole teams of folks have said can not be done. Of course they should have said we do not have the intestinal fortitude to git-r-done.
I have been using UNIX actually HPUX since 1992. Unfortunately my old computer died and... (7 Replies)
Hi All,
I have a unix old script i but i am not able to understand the few commands in it and what it does. below is the script.
if ;
then
for F in $(find $DIR/. ! -name . -prune -name "DP_*.dat")
do
IN=${F##/*/}
OUT='ORD'$(echo $IN | cut -c7-)
exec.ksh $IN... (2 Replies)
Hi,
I am trying what the following loop does :
for i in XYZ
do
for j in M1 R1 R2 R3
do
if
then
kList=""
n=1
while
do
kList="$kList $n"
let n++
done
There are a couple of loop as mentioned above for R1.R2.R3. (1 Reply)
Hello,
Can someone please help me understand the shell script below for installing Jboss EAP 6? It is from jboss-as-standalone.sh, what does the highlighted code mean?
# Load Java configuration.
&& . /etc/java/java.conf
export JAVA_HOME
Thanks! (4 Replies)
Good afternoon everyone,
I am very new to UNIX shell scripting and I am trying to understand the following code. I know what it does but I need to modify it so it will allow me to pass a file name as *FILENAME*
Thank for any guidance offered.
if ] ; then
match=`expr "$file" :... (2 Replies)
Please help me understand how sort -k3,3 -k 4,4 short* works , is it sorting 3 and 4 th field ? what is the use of specifying 3,3 and 4,4 in sort and what is actually does and i see sort -k3 short* and sort -k3,3 -k 4,4 short* giving the same output.
Sort output attached
Please help (2 Replies)
I have a file with two line, one is header, the other actual value:
TYPCD|ETID2|ETID|LEG ID|PTYP|PTYP SUB|TRD STATUS|CXL REASON|CACT|CACTNM|ENCD|ENC
D NM|TRDR|ASDT|TRDT|MTDT|STDT|LS|SECID|SECID TYP|SECNM|PAR|STCC|MARKET PRICE|DIS
MARKET PRICE|MARKET PRICE CURRENCY|SRC OF SETTLEMENT... (2 Replies)
I am still learning shell scripting. Recently I see a function for read configuration. But some of special character make me confused. I checked online to find answer. It was not successful. I post the code here to consult with expert or guru to get better understanding on these special characters... (3 Replies)
Discussion started by: duke0001
3 Replies
LEARN ABOUT PLAN9
shell
shell(1F) FMLI Commands shell(1F)NAME
shell - run a command using shell
SYNOPSIS
shell command [command] ...
DESCRIPTION
The shell function concatenate its arguments, separating each by a space, and passes this string to the shell ($SHELL if set, otherwise
/usr/bin/sh).
EXAMPLES
Example 1: A sample output of shell command.
Since the Form and Menu Language does not directly support background processing, the shell function can be used instead.
`shell "build prog > /dev/null &"`
If you want the user to continue to be able to interact with the application while the background job is running, the output of an exe-
cutable run by shell in the background must be redirected: to a file if you want to save the output, or to /dev/null if you don't want to
save it (or if there is no output), otherwise your application may appear to be hung until the background job finishes processing.
shell can also be used to execute a command that has the same name as an FMLI built-in function.
NOTES
The arguments to shell will be concatenate using spaces, which may or may not do what is expected. The variables set in local environments
will not be expanded by the shell because "local" means "local to the current process."
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO sh(1), attributes(5)SunOS 5.10 5 Jul 1990 shell(1F)