This is my specific problem I need to solve (But my question is different, so please read on even if you don’t know what fail2ban is): I’m trying to use fail2ban on a linux server to ban brute force attacks on multiple services (ssh, dovecot, apache, postfix, …). Now I stumbled over the problem that fail2ban seems to execute multiple iptables commands at the same time (with threads in Python) and this fails pretty often [...]

I have a constantly running script that I output to a log file: script.sh >> /var/log/logfile I’d like to add a timestamp before each line that is appended to the log. Like: Sat Sep 10 21:33:06 UTC 2011 The server has booted up. Hmmph. Is there any jujitsu I can use? Asked by Antonius Bloch You can pipe the script’s output through a loop that prefixes the current date and time: ./script.sh | while IFS= [...]

I made a script to copy an image to a temporary directory, convert it to an another format, then move it to a final directory. But i can’t get the chmod command to work, the file is copied to the temporary directory but it’s chmod is stuck on -rw——- (the original chmod of the file). If i apply a 777 chmod on the original file, the copied one get a -rwx—— instead of a -rwxrwxrwx [...]

I have a script which starts a daemon process and then sleeps for 20 seconds. If I run the script on SLES11 SP1 or RHEL6 then after the script exits the process is still running. If I run the script on SLES11 SP3 or RHEL6.3 then after the script exits the process is no longer running. The process continues to run for the entire 20 second sleep and is killed when the process exits. The [...]

For the last couple of days, I’ve woken up to find rsync churning away with 1.6GB of memory, slowing my Mac down significantly. Activity Monitor only says that rsync is coming from sh, but I’m trying to track down more info; specifically, what shell script is calling rsync. How can I find that out? Asked by Rob D. It’s simple. Use the ps command to check the parent of the rsync process, something like this. [...]

is there a way to launch a php script and let it run on the server until it finishes? I use this php5-cgi /var/www/script.php -q & connecting via putty. When I close it (the session) the script stops! Why does it run dependent on the session? Asked by Sandro Antonucci Try nohup and disown: nohup php5-cgi /var/www/script.php -q & disown Answered by Dennis Kaarsemaker Check more discussion of this question. Bookmark on Delicious Digg this [...]

I have a shell script that used to run find on Ubuntu 10.04 but since I have moved to 12.04 it doesn’t work as before throwing the following messages: /home/checks.sh: 1: /home/checks.sh: date : not found find: invalid mode `0777\r’ the script is as follows: date echo “” echo “Files changed in the last 24 hours” echo “==================================” find /var/www -mtime -1 | grep -iv ‘.log’ echo “” echo “” echo “Files with permissions set [...]

Some numpty ran chown -R username. in the /home folder on our webserver thinking he was in the desired folder. Needless to say the server is throwing a lot of wobbelys. We have over 200 websites and I don’t want to chown them all individually so I’m trying to make a script that will change the owner of all the folders to the folder name, without the trailing /. This is all I have so [...]

When I run the command df -h on my new Ubuntu linux vServer I get the following: # df -h Filesystem Size Used Avail Use% Mounted on /dev/hdv1 466G 33G 434G 7% / none 16M 0 16M 0% /tmp Running du -sh gives # du -sh du: cannot access `./proc/13624/task/13624/fd/4′: No such file or directory du: cannot access `./proc/13624/task/13624/fdinfo/4′: No such file or directory du: cannot access `./proc/13624/fd/4′: No such file or directory du: cannot [...]

I don’t usually use SSH if I can get away with it, but if I have to I do of course, and I’ve seemingly done this for years while still managing to remain slightly confused about these different terms … from my basic research, this is my understanding, could someone verify/correct this? Telnet … before SSH, not secure SSH … ( secure shell ) the general name of the system/protocol Shell … short name for [...]