Does the rm command throw an error when ${vra} does not exist or does it simply proceed with a null byte or something followed by /* erasing everything in its path.
As a beginner in Linux / Bash everything seems to bring up a question.
This has been answered many times before. If the variable vra has not been defined, the command:
Code:
rm -rf "${vra}/"*
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.
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)
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 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)
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)
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)
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)
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)
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)
