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)
Hello all,
my unix is bash based and the finger command output is:
Login Name Tty Idle LoginTime Office
amos.john Amos John pts/26 1 Dec 5 16:18 (77.100.22.07)
What am trying to achieve is extract the Login (amos.john) and Name (Amos John) from this output without using awk or sed.
... (1 Reply)
Hi everyone,
I'm trying to extract the user name and full name from the finger command without using sed or awk.
Any pointers?
Thanks in advance. (6 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)
Could someone please tell me how to unset your .bashrc? I have tried all of these. I can't find anything useful from google.
unset -f .bashrc
unset .bashrc (9 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)
how to extract user machine name for current terminal using finger command
below command gives machinename for all session , is it possible to filter it to only currernt terminal ?
finger -b -p $LOGNAME | grep from (12 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)
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 CENTOS
safe_finger
SAFE_FINGER(8) Linux Programmer's Manual SAFE_FINGER(8)NAME
safe_finger - finger client wrapper that protects against nasty stuff from finger servers
SYNOPSIS
safe_finger [finger_options]
DESCRIPTION
The safe_finger command protects against nasty stuff from finger servers. Use this program for automatic reverse finger probes from the
tcp_wrapper (tcpd) , not the raw finger command. The safe_finger command makes sure that the finger client is not run with root privileges.
It also runs the finger client with a defined PATH environment. safe_finger will also protect you from problems caused by the output of
some finger servers. The problem: some programs may react to stuff in the first column. Other programs may get upset by thrash anywhere on
a line. File systems may fill up as the finger server keeps sending data. Text editors may bomb out on extremely long lines. The finger
server may take forever because it is somehow wedged. safe_finger takes care of all this badness.
SEE ALSO hosts_access(5), hosts_options(5), tcpd(8)AUTHOR
Wietse Venema, Eindhoven University of Technology, The Netherlands.
Linux 21th June 1997 SAFE_FINGER(8)