Problem – when I try to connect to an Amazon AWS EC2 linux instance through SSH, instead of connecting, it simply shows a > prompt as if asking for more info. command entered through terminal ssh -i “<private_key_path>” <user>@<host_address> when i hit enter, it just shows a &…
Tag: linux
Moving ec2 instance with SSL
I have a EC2 instance that I have to reset the sudo. Created a new Instance, if I just detach everything from old instance and attach to new instance again, what will happen to the ssl cert that was on the old system? is that included in the volume? Answer If ‘detach everything’ means EBS volumes …
Background rsync and pid from a shell script
I have a shell script that does a backup. I set this script in a cron but the problem is that the backup is heavy so it is possible to execute a second rsync before the first ends up. I thought to launch rsync in a script and then get PID and write a file that script checks if the
Analyze log file of dnsmasq
I current facing a problem. When I open the dnsmasq log, it looks like this: It’s very difficult for us to analyze it. Anybody have a idea to only show the queried domain which should be like this? However I tried this: http://www.tannerwilliamson.com/analyzing-dnsmasq-log-with-awk/1610/ and its output …
Are badblocks related to a partition or permanent? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack …
gdb catch syscall condition and string comparisson
I would like to catch a system call (more specifically access) and set a condition on it based on string comparison (obviously for arguments that are strings). Specific example: when debugging ls I would like to catch access syscalls for specific pathnames (the 1st argument) int access(const char *pathname, i…
Expect script on linux
I would like to make a expect script which can answer the question by using srand functuon. For example, I will use netcat to connect to the server, and I will get a question from server like “please enter 0 or 1”; then I hope my script can answer the question automatically by using the code like …
sudo -H -u git gitosis-init < ~/id_rsa.pub | error: no such file or directory
I got this shell script from a blog about how to equip git with gitosis. But i got a “No such file or directory” error after running the script. I am puzzled,as the man manual says that: ,which is cited from linux manual. The -H option just sets the HOME environment variable to the homedir of the …
Get the status of a python process that was executed in another terminal
I have a python program that will create and execute another python script in a new terminal. To do so, I’m using subprocess.Popen. I’m trying to get the PID of the new process using .pid. However, the value of this pid doesn’t seem to match the real pid of the newly created process (the two…
SSE: unaligned load and store that crosses page boundary
I read somewhere that before performing unaligned load or store next to page boundary (e.g. using _mm_loadu_si128 / _mm_storeu_si128 intrinsics), code should first check if whole vector (in this case 16 bytes) belongs to the same page, and switch to non-vector instructions if not. I understand that this is ne…