All Questions
69
questions
1
vote
2
answers
2k
views
IPTables - Allow (ACCEPT) specific IPs within a blocked (DROP) subnet
I'm fairly new to IPTABLES, but I've written a script that blocks several of Amazon EC2's IP ranges from an input file, blacklist.txt:
...
54.66.0.0/16
54.67.0.0/16
...
I also have a separate ...
- 11
2
votes
4
answers
4k
views
Cannot chroot /mnt/sysimage After Putting New Image on HP Computer
I am using Clonezilla to put a new CentOS 7 image on our computers. Most of them are Lenovo desktops, and we have a few HP desktops that are all currently running the old image.
In order for the new ...
- 21
0
votes
1
answer
457
views
What is the behavior of mv on /?
One of our users accidentally performed mv /* ../ without root permission. After checking the effects using diff I was surprised to find that mv apparently functioned as cp when applied to the / dir.
...
- 3
1
vote
1
answer
3k
views
upload file to ftp using bash script Linux
I know this is a pretty simple question but unfortantly I can't find any solution for my problem.
I have file called: x.txt inside the root directory /x.txt.
And I want to upload the file into my ...
- 51
0
votes
1
answer
436
views
Run jpegoptim in a cronjob once a week, on CentOS from within cPanel, only for files added within the past week?
I've installed jpegoptim and can manually run it via the SSH command line:
jpegoptim *.jpg --strip-all
I'd like to take that command line and put it into a Cronjob that runs once a week. I'm running ...
- 101
0
votes
1
answer
243
views
Why is this simple cronjob not running and how do I check the relevant log files?
I have an 'R' script that I wish to run at 00:30 every day, that is, 12:30 AM everyday. The script itself is located in ~/Desktop/foldername/runme.r and which Rscript tells me that the exact path to ...
- 394
0
votes
2
answers
1k
views
cron job on centOS 6.5
I have used these 2 references to insert a new crontab entry.
redhat
ubuntu
I have created a new bash file and moved it to /usr/bin. That sh file has execute permissions for the root user and the ...
- 101
2
votes
1
answer
7k
views
Linux - create screen as another user
I'm trying to create a new screen on my server (CentOS 5.11), but instead of starting it with my user, I would prefer to use another user with restricted permissions, just to be on the safe side.
So, ...
- 131
5
votes
1
answer
10k
views
Whitelisting commands a user can use with sudo
I've been attempting to set up a whitelist of commands a user can run on my system. The server I'm using is running CentOS 7. What is the syntax that should be used to only allow a certain group of ...
- 153
2
votes
1
answer
6k
views
bash: /home/user/.bashrc: Permission denied when try to change user from root to user
I'm on centos, when I login as root and use su x to change user to x, it shows this:
bash: /home/x/.bashrc: Permission denied
I try to source ~/.bashrc but nothing changes and I also tried following ...
- 131
1
vote
0
answers
51
views
CentOS - using PXE to install it on my host ( kickstart configuration )
I am trying to install an OS from our server through PXE ( Preboot Execution Environment ).
However, on my host, I have two disks say A ( /dev/sda ) and B ( /dev/sdb )
The default installation path ...
- 161
2
votes
1
answer
122
views
Running a process in the background using &
I have created the following script:
#!/bin/bash
while :
do
echo "1" >> test.txt
sleep 1
done
If I run the command using ./exm.sh & it runs on the background as expected and it ...
- 21
-1
votes
2
answers
293
views
formatting output in bash shell to remove special characters - linux
I am issuing the command below against a logfile
grep "Oracle Audit" /var/adm/messages | awk '{print $6}'
How do I format the below output
Audit[9460]:
Audit[10507]:
Audit[10507]:
Audit[10507]:
to ...
- 1,625
0
votes
1
answer
12k
views
-bash-4.2$ for command line?
I don't know why when I SSH with putty onto my VPS, my command line starts with: -bash-4.2$ It hasn't ever been like that, it was myname@localhost
Only thing I have done different in the last 24 ...
- 15
1
vote
1
answer
474
views
redirection - why it doesn't work this way
I know there are 3 streams attached to a process when it is run namely the input, output and error stream.
And redirection execution work from left to right.
I intend to execute a command, redirect ...
- 1,625