Hi,
Command "chfn" can be used to change finger information.. can anybody tell me how to unset i mean reset the same finger information.
Thanks in advance,
Chanakya (3 Replies)
Hi All,
May be this is a very simple question...
$ b=8
$ readonly b
$ echo $b
8
$ b=90
-bash: b: readonly variable
$ unset b
-bash: unset: b: cannot unset: readonly variable
I m not able to change the readonly mode of variable b
Please help me out..
Thanks
Nidhi (2 Replies)
Hi,
I am writing a BASH script. My questions regard deleting elements of arrays.
I have an array:
michael-browns-powerbook-g4-15:~ msb65$ test_array=(1 2 3 4)
michael-browns-powerbook-g4-15:~ msb65$ echo ${test_array}
1 2 3 4
To delete the second element of test_array I type:... (3 Replies)
can I use unset to unset all the variables in a shell sciprt?
VAR1=1
VAR2=2
VAR3=3
unset
whether this unset will afftect any system variables?
Thanks, (3 Replies)
I'm wondering, is the number of variables will affect execution time of my bash script or maybe affect the cpu workload, cpu memory, etc ?
If I create so many variables, should I unset each one of that variables after I used them or after I think they are no longer needed?
and if my script... (2 Replies)
I have a script with a $PASSWORD variable. I unset it right after using it, just to minimize the chance it could be left around for a snooper. That worked just fine... until I used a password with a value of "P@ssw0rd" Now, unset (even with -f, even with the variable enquoted) tells me: unset:... (1 Reply)
I have tried to thoroughly search other threads before posting this question...
I have a shell script (bsh) that I'd like to "re-execute" if the user chooses to. Before the program is executed again the local variables (those set within the script) need to be unset. Is there a command that... (6 Replies)
Hi all,
Does anyone know how to change PROC_MEM_RES?
We have a DB server with quite a few oracle instances (RAC) and we are getting critical alerts for PROC_MEM_RES.
Anyone know how to increase the current setting or what we should do about it?
Thanks in advance.
john (2 Replies)
Hi,
Can someone tell what is the path for "unset", I tried "which" command but getting below error
# which unset
/usr/bin/which: no unset in (/usr/lib/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin/:/root/bin) (9 Replies)
Discussion started by: stew
9 Replies
LEARN ABOUT DEBIAN
unset
unset(3tcl) Tcl Built-In Commands unset(3tcl)__________________________________________________________________________________________________________________________________________________NAME
unset - Delete variables
SYNOPSIS
unset ?-nocomplain? ?--? ?name name name ...?
_________________________________________________________________DESCRIPTION
This command removes one or more variables. Each name is a variable name, specified in any of the ways acceptable to the set command. If
a name refers to an element of an array then that element is removed without affecting the rest of the array. If a name consists of an
array name with no parenthesized index, then the entire array is deleted. The unset command returns an empty string as result. If -nocom-
plain is specified as the first argument, any possible errors are suppressed. The option may not be abbreviated, in order to disambiguate
it from possible variable names. The option -- indicates the end of the options, and should be used if you wish to remove a variable with
the same name as any of the options. If an error occurs, any variables after the named one causing the error are not deleted. An error
can occur when the named variable does not exist, or the name refers to an array element but the variable is a scalar, or the name refers
to a variable in a non-existent namespace.
EXAMPLE
Create an array containing a mapping from some numbers to their squares and remove the array elements for non-prime numbers:
array set squares {
1 1 6 36
2 4 7 49
3 9 8 64
4 16 9 81
5 25 10 100
}
puts "The squares are:"
parray squares
unset squares(1)squares(4)squares(6)
unset squares(8)squares(9)squares(10)
puts "The prime squares are:"
parray squares
SEE ALSO set(3tcl), trace(3tcl), upvar(3tcl)KEYWORDS
remove, variable
Tcl 8.4 unset(3tcl)