per my knowledge "$ " will pass the value of host to PS1.
pls correct me if i am wrong.
"$ " is not passing anything but itself.
Quote:
below is the script i am using
#!/bin/ksh
PS1=${HOST:=`uname -n`}"$ " ; export PS1 HOST ;
echo "PS1=$PS1"
echo "HOST=$HOST"
and the o/p which i am getting is below
PS1=az91cp01$
HOST=az91cp01
This command is setting PS1 to either the value of the HOST variable if set, or the result of the command uname -n if unset, followed by the dollar sign and a space. HOST is set to uname -n.
Me dumb. Can't get this to work...
#!/bin/sh
export JAVA_HOME_BAK=${JAVA_HOME}
or
#!/bin/sh
export JAVA_HOME_BAK=/usr/java
or
#!/bin/sh
export JAVA_HOME_BAK=$JAVA_HOME
or
#!/bin/sh
export JAVA_HOME_BAK $JAVA_HOME
etc.... none work.
Either i get: "JAVA_HOME_BAK=/usr/java: is not... (1 Reply)
hi, :)
I created a main script called "Paymain.prg" ( /proj/paymain.prg)
In this script i created two variables as follows
MASTER=/HOME/emaster.dbf
TRAN=/HOME/etran.dbf
Aftre that i exported that two variables
EXPORT MASTER TRAN
But when i use these two variable in another script calld... (3 Replies)
Hi,
Can anyone please let me know the meaning of this line,i am not able to understand the egrep part(egrep '^{1,2}).This will search for this combination in beginning but what does the values in {}signifies here.
/bin/echo $WhenToRun | egrep '^{1,2}:$' >/dev/null (1 Reply)
Hi, I am facing a problem while scheduling an export of a table using cron job. I have written a simple export command inside a shell script test.sh like
echo started
exp schemaname/temp1234 file= /test/d.dmp tables=per_st log= /test/d.log
echo ended
I tried scheduling it through... (6 Replies)
hello all,
I know this is a silly question but i have no answer.
I have a shell script temp.ksh
export value="mynh"
echo $value
but when i execute the temp.ksh "mynh" is printed but
when i give echo $value in the shell after the program is executed, nothing is printed.
... (3 Replies)
Hello,
I've inherited an NFS setup that allows external servers to write to an NFS share on a Centos box. Here is an example line from /etc/exports (there are four entries that only are different based on server IP adress).
/exports/foobar... (4 Replies)
If I don't explain my issue well enough, I apologize ahead of time, extreme newbie here to scripting.
I'm currently learning scripting from books and have moved on to the text Wicked Cool Shell Scripts by Dave Taylor, but there are still basic concepts that I'm having trouble understanding.
... (10 Replies)
Hi all,
I'm not clear of this regexp command:
regexp {(\S+)\/+$} $String match GetString
From my observation and testing,
if $String is abc/def/gh
$GetString will be abc/def
I don't understand how the /gh in $String got eliminated.
Please help. Thanks (2 Replies)
Hi
i was going through the script debugging technique. below example was given in the book.
1 #!/bin/sh
2
3 Failed() {
4 if ; then
5 echo "Failed. Exiting." ; exit 1 ;
6 fi
7 echo "Done."
8 }
9
10 echo "Deleting old backups,... (11 Replies)
I have this code
#!/bin/bash
LZ () {
RETVAL="\n$(date +%Y-%m-%d_%H-%M-%S) --- "
return RETVAL
}
echo -e $LZ"Test"
sleep 3
echo -e $LZ"Test"
which I want to use to make logentrys on my NAS. I expect of this code that there would be output like
2017-03-07_11-00-00 --- Test (4 Replies)
Discussion started by: matrois
4 Replies
LEARN ABOUT DEBIAN
env::ps1
Env::PS1(3pm) User Contributed Perl Documentation Env::PS1(3pm)NAME
Env::PS1 - prompt string formatter
SYNOPSIS
# use the import function
use Env::PS1 qw/$PS1/;
$ENV{PS1} = 'u@h $ ';
print $PS1;
$readline = <STDIN>;
# or tie it yourself
tie $prompt, 'Env::PS1', 'PS1';
# you can also tie a scalar ref
$format = 'u@h$ ';
tie $prompt, 'Env::PS1', $format;
DESCRIPTION
This package supplies variables that are "tied" to environment variables like 'PS1' and 'PS2', if read it takes the contents of the
variable as a format string like the ones bash(1) uses to format the prompt.
It is intended to be used in combination with the various ReadLine packages.
EXPORT
You can request for arbitrary variables to be exported, they will be tied to the environment variables of the same name.
TIE
When you "tie" a variable you can supply one argument which can either be the name of an environement variable or a SCALAR reference. This
argument defaults to 'PS1'.
METHODS
"sprintf($format)"
Returns the formatted string.
Using this method all the time is a lot less efficient then using the tied variable, because the tied variable caches parts of the
format that remain the same anyway.
FORMAT
The format is copied mostly from bash(1) because that's what it is supposed to be compatible with. We made some private extensions which
obviously are not portable.
Note that this is not the prompt format as specified by the posix specification, that would only know "!" for the history number and "!!"
for a literal "!".
Apart from the escape sequences you can also use environment variables in the format string; use $VAR or "${VAR}".
The following escape sequences are recognized:
a The bell character, identical to "