How can I recursively find all files in current and subfolders based on wildcard matching?
Use find for that: find needs a starting point, and the . (dot) points to the current directory.
linux
-bash: syntax error near unexpected token `newline’ for display command
The reason gives you a syntax error near unexpected token newline is that the arrow brackets in whatever documentation you were following were not intended to be taken literally. A < indicates that the thing that follows is a filename to be used as input on stdin, and a > indicates that the thing that follows is a filename to be … Read more
How to upgrade pip3?
I want to use python3.5 to develop basically, but many times when I install the module for the python 3.5, it always failed. And the terminal told me that higher version is available, it did not work when I upgrade it.
How to substitute shell variables in complex text files
Looking, it turns out on my system there is an envsubst command which is part of the gettext-base package. So, this makes it easy: Note if you want to use the same file for both, you’ll have to use something like moreutil’s sponge, as suggested by Johnny Utahh: envsubst < “source.txt” | sponge “source.txt”. (Because the shell redirect will … Read more
“E: Unable to locate package python-pip” on Ubuntu 18.04 [duplicate]
Try following command sequence on Ubuntu terminal:
subprocess.Popen(): OSError: [Errno 8] Exec format error in python?
Yesterday, I wrote and ran a python script which executes a shell using subprocess.Popen(command.split()) where command is string which constitutes .sh script and its argument. This script was working fine until yesterday. Today, I ran the same script and now I am continuously hitting this error. I know there are similar questions that have been asked before related to this question, but in … Read more
Pass a password to ssh in pure bash
Since there were no exact answers to my question, I made some investigation why my code doesn’t work when there are other solutions that works, and decided to post what I found to complete the subject.As it turns out: “ssh uses direct TTY access to make sure that the password is indeed issued by an … Read more
error: lvalue required as unary & operand
The address-operator & requires a variable to take the address from. The result of your cast (long)u32_Time is a temporary that does not necessarily reside in memory and therefore has no address that could be taken. So if that piece of code ever compiled somewhere it was a nonstandard compiler extension. The standard, §5.3.1,3 demands: The result of the … Read more
How to print pthread_t
This will print out a hexadecimal representation of a pthread_t, no matter what that actually is: To just print a small id for a each pthread_t something like this could be used (this time using iostreams): Depending on the platform and the actual representation of pthread_t it might here be necessary to define an operator< for pthread_t, because std::map needs an ordering on the elements:
How to extract C source code from .so file?
I am working on previously developed software and source code is compiled as linux shared libraries (.so) and source code is not present. Is there any tool which can extract source code from the linux shared libraries?