Tag: linux

How to get user from init bash script Linux(before user session created)

At Debian im trying to change specific directory ownership after every reboot. But in my case it doesnt work, because user always set as root at reboot time. When i try this in terminal it works well (i think because myUser session created) but i need to change it at reboot time. So far i refer this link but it

How to correctly time speed of writing to a disk (i.e. file) in C

c++ linux time

I have a Zynq SoC which runs a Linux system and would like to time the speed at which I can write to its SD card in C. I have tried out clock() and clock_gettime() where for the latter, I have done the following: The times that I’m getting are around 0.019 seconds for 2097152 bytes which I believe is

How does the command ‘echo “6” > /proc/sys/kernel/printk’ work?

file linux linux-kernel printing shell

Please see an example in How can I show printk() message in console?, If the /proc/sys/kernel/prink was a normal file, the file would have changed to just “6”, a single number. But I know the proc file system is a file system in ram and I guess it works different. In what mechanism did the file changed that way? And

Adding data based on date from another dataframe

as.date date linux r time

I have two datasets. One with multiple dates: and one with sunrise and sunsets data: I want to add a column to the first dataframe with either “Day” or “night”, based on whether the date and time from the first dataframe is between the sunrise and sunset time and dates. I tried copying and if_else functions, but the length of

Git push asks username & password for HTTP repo origin

git git-push github linux

I am working on a project of mine and I got the codes uploaded in github. I started working in this project from Win10 os and currently I’m working in Arch linux. In windows it didn’t use to ask me for any password but it does now. I’ve never pushed from my linux before. Today when I tried to push

How can I change my shell every time I log in to bash by editing .cshrc file? [closed]

linux shell unix

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 Exchange site, you can leave a comment to explain where the question

Output was lost in linux terminal. How do I restore? [closed]

bash linux terminal

Can I use ioread32_rep(addr, buf, 2) to replace ioread64()?

c++ linux linux-device-driver qemu

I am currently going through Linux Device Drivers book and found the functions for reading from I/O memory: To read from I/O memory, use one of the following: unsigned int ioread8(void *addr); unsigned int ioread16(void *addr); unsigned int ioread32(void *addr); If you must read or write a series of values to a given I/O memory address, you can use the

Is there a command execution vulnerability in this C program?

c++ decompiling linux security

So I am working on a challenge problem to find a vulnerability in a C program binary that allows a command to be executed by the program (using the effective UID in Linux). I am really struggling to find how to do this with this particular program. The disassembly of the function in question (main function): According to Ghidra, this

grep AND Operations

grep linux

I want to simulate AND operation in grep . List all the file files contains “Some Words” and contain “Some Other Words” anywhere in the file. So far I tried # but it is not working. Answer Using GNU tools: The first grep lists files (-l) containing string1 -i: case insensitive, -r: recursive, -Z: file list delimited by ascii null