I am trying to rename files in current directory by prepending timestamp value using find command like below But getting ‘Can’t move, no such file or directory error’, but appending works well with below command, not sure what is the difference between two. Answer Try this
Tag: linux
SWIG: Access Array of Structs in Python
Say I have the following static constexpr array of c struct: How can I access elements in ns1::ns2::PERSONS in python by using swig? One way I can think of is to create a accessor like const Person& get(uint32_t index) in the swig interface file. Tho, I wonder whether there is a more elegant way that I don’t have to create
What does the “ls -A” option do in linux?
I was wondering what does the ls -A option do on it’s own and why does it work in the code below when checking if a directory is empty or not… ? I can’t find any other answers online and the man pages I don’t understand what it means when I read the documentation. Thanks Answer Nothing related to bash.
How to toggle Autokey phrases?
I want to remap wasd to arrow keys, but then be able to use a hotkey to toggle these (four) phrases so I can go back to wasd behaviour easily. Just putting a window filter on the phrase will not be sufficient. The only ways I can see to do this is to write bash scripts to directly modify the
Getting a part of string in tcl
I’m trying to split the following string : Groups/Group#1.rpt to get only the word Group#1.rpt using tcl ; I did the following but the output was empty : Answer This is a job for a specific built-in: file tail! Don’t use string manipulation directly for this; there are some complex nuances on different platforms. This command handles all the tricky
Kill child process spawned with execl without making it zombie
I need to spawn a long-running child process and then kill it from the parent code. At the moment I do like this: This does the job in the sense that the child process is stopped, but then it remains as a zombie. I tried to completely remove it by adding: to no avail. I must be doing something wrong
How to use error validation in Bash for checking an entry in a file
If there is no entry of that species name in the file how do I give the user an error to say not found? Answer The answer to your immediate question is to examine the exit code from grep. But probably also refactor the loop: A better design altogether is probably to make the search term a command-line argument. This
C Language program executable file extention naming convention ( a.out )
Are there good practices or preferred industry standard conventions on how to name (what would be named by default as) a.out files, especially in terms of their extensions? If it depends on the platform, I’d like to know especially for Linux. Technically I won’t even need an extension, and most modern shell helps identify executable files by green color, nevertheless
How does the bitwise AND help in the if statements in the Linux Kernel?
Background on what the code is trying to achieve: “Various parameters of the new process (e.g., euid, egid, argument list, environment, filename, etc.) that are subsequently passed to other functions are, for the sake of simplicity, combined into a structure of type linux_binprm. prepare_binprm is used to supply a number of parent process values (above all, the effective UID and
jq script file not getting the key/value pair
I would like to put all jq filters inside a text file and use the jq -L option to execute the filters. However, I can’t get this simple thing working. Inside my sample2.json file, I have: Inside my json2csv file, I have: When I do: The output is the whole sample.json file, like this: but I would expect the output