Fabian Lee : Software Engineer

Bash: indirect reference to evaluate a variable value

December 6, 2023
Categories: Linux

If you want a variable to reference another variable in Bash, that is possible using a concept called indirect reference. Below is a simple example where ‘varname’ contains the name of another variable ‘foo’. # our variable foo=bar # our reference varname=foo # the following syntax will ERROR and DOES NOT work !!! echo “${$varname}” … Bash: indirect reference to evaluate a variable value

Bash: cloning the ownership and permissions of another file using reference

July 25, 2021
Categories: Linux

If you need to create a file that has the exact same ownership and permission bits as an existing file, the ‘reference’ flag provides a convenient shortcut. For example, if you had a file named ‘myoriginal’ that had the exact ownership and permissions required for a new file ‘mynewfile’, you could use the commands below … Bash: cloning the ownership and permissions of another file using reference