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linux – created duplicate root user, cant login anymore.. what do i do? [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 …
Why is idle skipping over f = open(‘filename’ , ‘r’)
I’m writing a program in python and I am having issues getting idle to read my file out. If I use improper syntax it tells me, so it is being read by the compiler but not printing it for the user. Any help would be appreciated. Here is my code. Answer You only put file into variable ‘f’, so …
aws cli cannot read from dynamodb docker container
i am running dynamodb on a docker container and am able to write to the table using python boto3, which is all fine and good. now when I query the dynamodb table from outside the container using aws CLI, its give this error and cannot find the table the name of the sqlite db created by dynamodb docker contain…
strace -e trace=network only showing SIGCHLD?
I am using the command: strace -tt -o ${filename} -e trace=network gdb –args ${EXECUTABLE} to track which system calls occur whilst connecting to and sending messages to a peer. However, I am only receiving the following entries: Should I not see the socket calls to read() close() etc? Answer Using stra…
How to detect how often a button has been pushed consecutively?
I want to monitor the output of a command which keeps running infinitely and prints a line every now and then. It displays events of a hardware button and each line indicates a push. My script is supposed to run other commands when it receives lines, but the problem is that not the content of those lines deci…
Ubuntu: Sendmail exited with error 70 [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 …
Compiling pintool with sqlite3 database
I am writing a pintool to instrument my binary. I would like to use sqlite3 database to store the information about instructions. I can compile and execute sqlite3 “helloworld” example without any problem. As well I can compile and execute my pintool without sqlite connection. However, whenever I …
How does linux kernel switch between user-mode and kernel-mode stack?
How does linux kernel switch between user-mode and kernel-mode stack when a system call or an interrupt appears? I mean what is the exact mechanism – what happens to user-mode stack pointer and where does kernel-mode stack pointer come from? What is done by hardware and what must be done by software? An…
error in exporting glusterfs volume using samba/cifs
I am trying to export glusterfs mount point as the samba export, and then mount it using CIFS protocol. I have followed the below steps: Added below lines to smb.conf file Started the smb service: when i try to mount it using the CIFS getting below error: I am not sure,the steps I followed are fully correct I…