How to set Python3.5.2 as default Python version on CentOS?
Is there a way to set the Python 3.5.2 as the default Python version on CentOS 7? currently, I have Python 2.7 installed as default and Python 3.5.2 installed separately.
bash
Integer File Descriptor “0” in open()
In Python 3, it is possible to open a file object using an “integer file descriptor” with the format:
How to store the result of an executed shell command in a variable in python?
I need to store the result of a shell command that I executed in a variable, but I couldn’t get it working. I tried like: import os call = os.system("cat syscall_list.txt | grep f89e7000 | awk '{print $2}'") print call But it prints the result in terminal and prints the value of call as zero, … Read more
Run interactive Bash with popen and a dedicated TTY Python
I need to run an interactive Bash instance in a separated process in Python with it’s own dedicated TTY (I can’t use pexpect).
I used this code snippet I commonly see used in similar programs:
How do I test if an item is in a bash array?
Help for a simple script
Executing a Bash Script Function with Sudo
I have a script that does a number of different things, most of which do not require any special privileges. However, one specific section, which I have contained within a function, needs root privileges.
How to use associative arrays safely inside arithmetic expressions?
A few Bourne-like shells support associative arrays: ksh93 (since 1993), zsh (since 1998), bash (since 2009), though with some differences in behaviour between the 3.
how can I add (subtract, etc.) two numbers with bash?
I can read the numbers and operation in with:
Replace a long string with the sed command: Argument list too long error
I’m trying to execute this command
Finding largest file recursively
I am trying to find the largest file in a directory recursively. If there is a subdirectory inside of that directory the function needs to go inside that directory and check to see if the largest file is there. Once the largest file is found the output is displayed with the relative path name and the name and size of the largest file.