08-08-2017
Variables can also be defined in one of your login shell's startup scripts. Depending on what shell you're using (not necessarily that shell that is used to run the script you're asking about), the startup scripts could have different names. You might start by looking at a file named .profile in your home directory and at the file named /etc/profile.
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1. Shell Programming and Scripting
Hello All,
I have a script that will email out if the email address is specified as parameter 1.
I am using ksh, and then tried the following :
email=$1
Following did not work, I am getting error
test -z $email
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test -n $email
test ${?email}
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2. Shell Programming and Scripting
Hi,
I have a parameter file and it contains following items
$ cat TransactionParams
From_Date_Parm=2005-02-25
To_Date_Parm=2005-05-25
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Hi,
Is it possible to use a variable as a fieldname parameter for the cut command. I am trying to extract fields from a variable. Say that I want to cut the fields 1,3,5,7,9, etc, but I don't know how many fields that the variable will have i.e. could be 100 or more. I thought that I could use... (3 Replies)
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4. Shell Programming and Scripting
Hi,
I have two bash shell scripts:
test:
rrdhcp78-120:test_data msb65$ cat ~/bin/test
#!/bin/sh
array1=()
echo 'elements in array1:' ${#array1}
~/bin/test2 $array1
test2:
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#!/bin/sh
array2=${1} (5 Replies)
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5. Shell Programming and Scripting
HI all,
I have a parameter file with entries like
$$Name =Abhinav
$$CUTOFF_DATE = 11/11/2209
I am reading a variable from this file using a awk command like :
var2=`awk -F"" "/CUTOFF_DATE/{f=$1;}{print f;}" InputFIleName`
but facing an error like
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6. Shell Programming and Scripting
Hello again :)
Am currently trying to write a function which will delete a record from a file.
The code currently looks as such:
function deleteRecord() {
clear
read -p "Please enter the ID of the record you wish to remove: " strID
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7. Shell Programming and Scripting
Hi,
In my script, there is a variable as below
TME=`date +%H`
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8. Shell Programming and Scripting
hi all,
i have a parameter file of following format, i want a method which can get the value of specific parameter.
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<Parameter Name="FileLocationWindows">
<Description>
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9. Shell Programming and Scripting
Hi All,
I have below variable,
xyz=\$AI_XFR
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$AI_XFR
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=> echo $AI_XFR
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10. Shell Programming and Scripting
Say I have something like this to try and build a parameter string:
OPT1="This is my Option";
OPT2="/folder/file";
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./script.ksh -n 1 $PARMS;
./script.ksh -n 2 $PARMS;
./script.ksh -n 3 $PARMS;
./script.ksh -n 4 $PARMS;
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LEARN ABOUT REDHAT
sulogin
SULOGIN(8) Linux System Administrator's Manual SULOGIN(8)
NAME
sulogin -- Single-user login
SYNOPSIS
sulogin [ -e ] [ -p ] [ -t timeout ] [ tty-device ]
DESCRIPTION
sulogin can be invoked by init(8) when the system goes into single user mode (this is done through an entry in inittab(5)). Init also tries
to execute sulogin when it is passed the -b flag from the bootmonitor (eg, LILO).
The user is prompted
Give root password for system maintenance
(or type Control-D for normal startup):
sulogin will connected to the current terminal, or to the optional device that can be specified on the command line (typically /dev/con-
sole).
If the -p flag was set, the single-user shell will be invoked with a dash as the first character in argv[0]. That will cause most shells to
behave as a login shell. The default is not to do this, so that the shell will not read /etc/profile or $HOME/.profile at startup.
After the user exits the single-user shell, or presses control-d at the prompt, the system will (continue to) boot to the default runlevel.
ENVIRONMENT VARIABLES
sulogin looks for the environment variable SUSHELL or sushell to determine what shell to start. If the environment variable is not set, it
will try to execute root's shell from /etc/passwd. If that fails it will fall back to /bin/sh.
This is very valuable together with the -b flag to init. To boot the system into single user mode, with the root file system mounted
read/write, using a special "failsafe" shell that is statically linked (this example is valid for the LILO bootprompt)
boot: linux -b rw sushell=/sbin/sash
FALLBACK METHODS
sulogin checks the root password using the standard methods first. If the -e option was specified, sulogin examines the next files to find
the root password. If they are damaged, or non-existant, it will use fallback methods that even go so far as to provide you with a shell
prompt without asking for the root password if they are irrepairably damaged.
/etc/passwd,
/etc/shadow (if present)
AUTHOR
Miquel van Smoorenburg <miquels@cistron.nl>
SEE ALSO
init(8), inittab(5).
11 Sep 2000 SULOGIN(8)