–Need to get the status of the background running script. Initially, I ran the script and terminated it turned to stat “T” further, running the same script but while grep getting the script with stat “T”and “R” Here, how to get the process with only “R”. h…
Tag: unix
How to read file in linux command line?
I’m doing this challenge thing and this is one of the levels: An agent on Level 05 has told us about another big hack he’s working on. Apparently someone broke into a popular shopping site, stole all the usernames and passwords and was going to post them online. Luckily, we got to them first and r…
terminate a job after few seconds and process to next step in loop
Short question Terminate a downloading command after few seconds Long detailed I have a file in which every line has a cron job written in such a way that if i parse over it line by line, then i will be able to run it manually. somewhat like this i want to cross check if i’m able to run all
Permission to access another remote server Linux, Ubuntu [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 …
How to comment out a string in xml file in shell
On above mention code i am trying to comment out all the line with pattern custom/Application in it sed command i use that is not working Answer This should work sed -e ‘/custom/Application/s/(^.*$)/<!–1–>/’ est.xml > new.xml
grep string after first occurrence of numbers
How do I get a string after the first occurrence of a number? For example, I have a file with multiple lines: I want to get the following output: Thank you. Answer Imagine the following two input files : A quick solution with awk would be : This line substitutes the first string of anything that does not cont…
How to kill a process after a given real running time in Bash?
For killing a process after a given timeout in Bash, there is a nice command called timeout. However, I’m running my program on a multi-user server, and I don’t want the performance of my program to be influenced by others. Is there a way to kill a process in Bash, after a given time that the prog…
setpgid for Child Zombie Process Gives ESRCH instead of EACCES?
According to the man setpgid(2) page, EACCES An attempt was made to change the process group ID of one of the children of the calling process and the child had already performed an execve(2) (setpgid(), setpgrp()). ESRCH For getpgid(): pid does not match any process. For setpgid(): pid is not the calling proc…
Interruption of signal handler with other signal?
Can a signal handler be interrupted by another signal (except of SIGKILL, SIGSTOP)? Therefore, do I need to check for EINTR in my signal handler when calling interruptable syscalls? (Linux and other Unixes) Answer Yes, the execution of a signal handler may itself be interrupted by the delivery of another sign…
Bash Script Unstable Result
I have bash script and I put in the crontab. It runs every 10 minutes. When I run it manually, it gives perfect results. It creates “.tmp” files and these “.tmp” files are not empty, but Crontab results are not as I expected. it only creates “.tmp” files. Contents of “…