Say I am in the initial user namespace and there is an empty root-owned file in some directory: Now I am switching to a new user namespace with unshare -Ur. In this namespace, root.txt is reported to be owned by “nobody” because original root uid(0) is not mapped to the new namespace: Then I use v…
Tag: linux
How to add number assigned as array
I have that script that is supposed to read data from two txt files and add them. For that matter I have used array. I can read the data but there is a problem with the addition. Instead of ${dataAll[$i]}= $( ${data1[$i]}+${data2[$i]} ), I have also used ‘expr ${data1[$i]}+${data2[$i]}’ The analys…
How do i fix ksoftirqd 100% cpu
I am doing nothing and ksofttirqd uses 100% of my cpu and my pc is very slow. I looked in my /proc/interrupts and there are a lot of “local time interrupts”, “thermal event interrupts”. How do i fix it? (I run ubuntu 18.4) sensors Answer As you can see from the sensors output, your CPU…
Why print empty path in shell script?
samuel@:~/…/linux$ ./test.sh find . -type f -name “*” samuel@:~/…/linux$ How do I fix this to get find . -type f -name “*” ‘s result? Answer I suggest to use an array:
How can I ask GCC to use a different standard library?
I have a debug version of libstdc++ 6 in /usr/lib/debug/usr/lib/x86_64-linux-gnu/. I would like to tell gcc/g++ to use this library instead of the standard library version without debug symbols. I tried using -nostdlib and passing the library path explicitly with -L, but get linking errors such as It seems th…
Share Memory in Linux using C
Is it safe to use shm_unlink even there are other process currently open the shared memory? For exmaple: Process B shm_open and then Process A shm_unlink. Is it ok for Process B? Answer Yes, it is safe to call shm_unlink if another process has it opened. Per the man page for shm_unlink: The operation of shm_u…
FTP using Apache commons not working – Error: 550 Dataset not found (FTPid that i am using is getting appended to filename)
I am trying to ftp the file from Linux VM to an AS400 server. I was able to login to server in passive mode but when trying to use the STOR command to upload the file getting below error: Not sure why the ftpid that i am using is getting prefixed to the filename. Is there any way to avoid
How do I correct this printing out copied files from directory in Unix Bourne Shell?
So i need to write a Unix Bourne Shell to to copy all the files from the directories named dir1 and dir2 into a new directory named dir3. The script first copies all the files from dir1 into dir3. The script then copies every file from dir2 to dir3 subject to these conditions: if the file from dir2 is not
Linux CentOS 8 – Pip3 install Mariadb
Currently i’m working on a school project where I have to use MariaDB in a Python3 assignment. I have to build a Python script that connects to a database and put information into it. So said and done, I have created a Python script: But now my real issue is starting. I’m working with a Linux Cent…
(Linux-Bash) Create an account for each user and add the user to its group from a text file [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago. Improve this question I have a username.txt which contains their username and specific group. As…