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Tag: linux

What really happens when deleting file [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 …

parsing complex string using shell script

I’m trying the whole day to find a good way for parsing some strings with a shell script. the strings are used as calling parameter for some applications. they looks like: I’m only allowed to use shell-script. I tried to use some sed and cut commands but nothing works fine. My tries are like: that…

How to set PATH in Ubuntu 17.10 for custom path

I made a folder called bin in /home/USER/bin on this, I created a file called hello ( for example) with this code: I did execute export PATH=$PATH”:$HOME/bin” and then $ . ~/.bashrc, but when I restarted the PATH is restored to default. How can I resolve it? Thank you! Answer The user bin director…

How to skip multiple directories when doing a find

I’ve written a find function that searches for a string in each file in a given path, while skipping a list of directory names that I don’t want searched. I’ve placed this script in my .bashrc file to be called like so: The find portion works great, and it colorizes the search text so that i…

How does this Makefile work?

This is the makefile: It produces log result: I can only understand first two lines in the log. How all this files: files get to compiling? They are contained in GOOGLEAPIS_CCS variable and it is only used in makefile in string. Can you explain step by step how this actually work? Answer The following rule ma…

Ruby, ffi, and a custom C library

I’m trying to create a custom C library I can call from Ruby using FFI. My library will wrap certain libtiff functions with my own code, and the resulting higher-level functions will be called from within Ruby via the FFI interface. I’ve got test code working in C, that compiles successfully to a …

Makefile : No rule to make target

I have a problem with Makefile. It should compile a .c file to an object file only if the .c file has been modified. But I have an error when I use all rule: When I use manually it works: My work directory: Makefile content: Answer this dependency line: concatenates $(OBJ_PATH) with the object name, but there…