chmod 755 vs u+x: numeric and symbolic modes
Change Linux permissions with chmod: the octal digits, the u/g/o symbolic form, why a recursive numeric mode breaks a tree, and what capital X fixes.
#coreutils
Filtering by topic #coreutils · clear
df says full, du says otherwise: find the space
Your VPS disk reads full and a directory walk cannot find the space. Find the deleted file a process still holds open, and the other causes.
Bash Command Substitution: $() vs Backticks
Why $(...) runs in a subshell, so cd and variables vanish, why backticks nest badly, and the process substitution tricks that keep state in your shell.