How can I programmatically determine the exact start byte and exact end byte of a LUKS header on a block storage device? I use Linux Unified Key Setup (LUKS) for Full Disk Encryption (FDE), so all of the data on my drive is encrypted using a strong master key that’s not derived from my passpharse, and I…
Is it possible to display a file’s contents and delete that file in the same command?
I’m trying to display the output of an AWS lambda that is being captured in a temporary text file, and I want to remove that file as I display its contents. Right now I’m doing: Is there a clever way to combine those last two commands into one command? My goal is to make the full combined command …
How to access Azure Linux web app path file
Trying to access file on path – wwwroot/templates/file.txt. It works using -_hostingEnvironment.ContentRootPath + “templatesfile.txt” on windows but same path says file does not exists. What Am I missing Answer Trying to access file on path – wwwroot/templates/file.txt. The following c…
How to make an alias for localhost that has a tld?
I was wondering how I would make an alias for localhost that has a tld. For example, foo.test wold connect to 127.0.0.1. I tried just adding a second line to /etc/hosts that also pointed to 127.0.0.1, but that didn’t seem to work. Although, I didn’t reboot, so that might be why. The end goal is to…
Is it safe to use boost provided shared memory and rt_signal (provided in linux) for realtime system?
I am currently working with building realtime IPC system. I am trying to build a realtime system free of all undeterministic components. I try to setup IPC based on shared memory model. Is it safe to use managed_shared_memory from boost library to minimize unpredictable latency? or should I use mmap() for mem…
Rst packets sent with libnet do not reset the connection
I am trying to do ‘rst hijacking’ by using a c script with libcap and libnet included. I use libcap to sniff all packets coming from and going to a host given as input to the program via the commandline. Then libnet sends rst packets to the host trying to connect to the specified host. However whe…
Append date to a filename in linux
I want add the date next to a filename (“somefile.txt”). For example: somefile_DDMMYYYYHHMMSS.txt Maybe a script will do or some command in the terminal window. I’m using Linux. Thanks in advance. Answer Something like can do the work:
SSH Key Exchange with alternate user
So I am using RHEL 7. I have two servers with the following user accounts root (obvious) admin I want the setup to work in the following manner. passwordless SSH from server 1 to server 2 using the admin user, but the SSH initiation is done from the root user always. We are not allowed to do ssh key exchange
How can i display the first five lines that differ between 2 files, in a shell script?
I ve tried using 2 arrays to compare the 2 files, but i m a rookie and i don’t know how to do it: Answer Do not use backticks `. Use $(..) instead. So instead of if ( “$i” == “$j” ) do if [ “$i” != “$j” ]. vec_fis_1 and vec_fis_2 are not arrays – ${v…
What’s difference between these redis starting commands
sudo /etc/init.d/redis-server start sudo service redis-server start sudo systemctl start redis-server sudo redis-server –daemonize yes Answer The last one is “nearest to the metal”, it directly starts the Redis server process with no special options, and is “stand-alone”. I would…