Does the rm command throw an error when ${vra} does not exist or does it simply proceed with a null byte or something followed by /* erasing everything in its path.
As a beginner in Linux / Bash everything seems to bring up a question.
This has been answered many times before. If the variable vra has not been defined, the command:
will invoke rm with one operand for every file in your system's root directory that does not start with a period. The rm command will then attempt to remove every file in the file hierarchies rooted in those pathnames and print a diagnostic message for every file it is unable to remove until you kill that command or wipe out your system.
UNIX and Linux system utilities are generally very happy to try to do whatever you tell them to even if you have told them to do something that could be disastrous. They don't generally try to second guess you and tell you you might be making a mistake.
Sir,
I using the following commands in a file (part of a bigger script):
#!/bin/bash
cd /opt/oracle/bin
ls -lt | tail -1 | awk '{print $6}' >> /tmp/ramb.out
If I run this from the command prompt the result is:
2007-05-16
if I run it as a cron job then... (5 Replies)
Hi everybody!
We have to upgrade serviceguard 11.14 to 11.16, so I get PHSS_36898 patch from HP.
Is it necessary to uninstall serviceguard 11.14 before install this patch? (I think so, but i am not sure).
Do you know if is "dangerous" this kind of upgrade? Any suggestions about?
Thx in... (1 Reply)
Hi ,
I have a piece of code ...wherein I need to assign the following ...
1) A command line argument to a variable
e.g origCount=ARGV
2) A unix command to a variable
e.g result=`wc -l testFile.txt`
in my awk shell script
When I do this :
print "origCount" origCount --> I get the... (0 Replies)
AIX:Command to get netaddress/subnet address command in IPv4/IP6
Can anybody help us with a command to retrieve netaddress/subnet address command in IPv4/IP6 on aix machine.
net/subnet address is in the format 172.16.212.0(signifies all 255 machines in an IPv4 network) (2 Replies)
I had a umount busy issue, that the usual fuser -mk did not solve, I did a umount -l and was able to unmount the device, I then got in trouble by the storage team staff:
Here was a snippet of their response:
Using "umount -l" is a potentially dangerous act.
The command combination for a lazy... (8 Replies)
Hi everyone,
when executing this command in unix:
echo "WM7 Fatal Alerts:", $(cat query1.txt) > a.csvIt works fine, but running this command in a shell script gives an error saying that there's a syntax error.
here is content of my script:
tdbsrvr$ vi hc.sh
"hc.sh" 22 lines, 509... (4 Replies)
Hello,
I have a Application which needs to run shell scripts in a elevated state (root) for system interrogation. So I execute each script using bash -C. This has worked really well.
I now want to add another layer of security, I cant inspect each of the scripts before they get deployed to the... (4 Replies)
HI Guys,
I hope you are well. I am trying to write a script that gets executed every time i open a shell (cshell). I have two questions about that
1) I need to enter these commands
$ echo $DISPLAY
$ setenv $DISPLAY output_of_echo_$display_command
How can i write a... (2 Replies)
Discussion started by: kaaliakahn
2 Replies
LEARN ABOUT HPUX
inews
INEWS(1) General Commands Manual INEWS(1)NAME
inews - send a Usenet article to the local news server for distribution
SYNOPSIS
inews [ -h ] [ -D ] [ -O ] [ -R ] [ -S ] [ header_flags ] [ input ]
DESCRIPTION
Inews reads a Usenet news article (perhaps with headers) from the named file or standard input if no file is given. It adds some headers
and performs some consistency checks. If the article does not meet these checks (for example, too much quoting of old articles, or posting
to non-existent newsgroups) then the article is rejected. If it passes the checks, inews sends the article to the local news server as
specified in the inn.conf(5) file for distribution.
OPTIONS -h In the standard mode of operation, the input consists of the article headers, a blank line, and the message body. For compatibility
with older software, the ``-h'' flag must be used. If there are no headers in the message, then this flag may be omitted.
-O The default Organization header will be provided if none is present in the article or if the ``-o'' flag is not used. To prevent
adding the default, use the ``-O'' flag.
-D As a debugging aide, if the ``-D'' flag is used, the consistency checks will be performed, and the article will be sent to the stan-
dard output, rather then sent to the server.
-A -V -W
For compatibility with C News, inews accepts, but ignores, the ``-A'', ``-V'' and ``-W'' flags.
-N The C News ``-N'' flag is treated as the ``-D'' flag.
-S If a file named .signature exists in the user's home directory, inews will try to append it to the end of the article. If the file
cannot be read, or if it is too long (for example, more than four lines or one standard I/O buffer), or if some other problem
occurs, then the article will not be posted. To suppress this action use the ``-S'' flag.
-R If the ``-R'' flag is used then inews will reject any attempts to post control messages.
header_flags
Several headers may be specified on the command line, shown in the synopsis above as header_flags. Each of these flags takes a sin-
gle parameter; if the value is more than one word (for example, almost all Subject lines) then quotes must be used to prevent the
shell from splitting it into multiple words. The options, and their equivalent header, are as follows:
a Approved
c Control
d Distribution
e Expires
f From
w Followup-To
n Newsgroups
r Reply-To
t Subject
F References
o Organization
x Path prefix
If the ``-x'' flag is used, then its value will be the start of the header. Any other host will see the site in the header, and
therefore not offer the article to that site. The Path will always end not-for-mail.
NOTES
If an unapproved posting is made to a moderated newsgroup, inews will try to mail the article to the moderator for posting. It will query
the remote news server for a moderators listing. If that doesn't succeed, it will fallback to using the local moderators(5) file to deter-
mine the mailing address. If no address is found, it will use the inn.conf file to determine a ``last-chance'' host to try.
If the NNTP server needs to authenticate the client, inews will use the NNTPsendpassword(3) routine to authenticate itself. In order to do
this, the program will need read access to the passwd.nntp(5) file. This is typically done by having the file group-readable and making
inews run setgid to that group.
Inews exits with a zero status if the article was succesfully posted or mailed, or with a non-zero status if the article could not be
delivered.
Since inews will spool its input if the server is unavailable, it is usually necessary to run rnews(1) with the ``-U'' flag on a regular
basis, usually out of cron(8).
HISTORY
Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews. This is revision 1.27, dated 1996/10/29.
SEE ALSO moderators(5), inn.conf(5). rnews(1).
INEWS(1)