# Shell Cheatsheet

Quelques astuces pour SHELL…

##### Boucler sur les sous-répertoires d’un répertoire
Operateur Description Exemple
-b file Checks if file is a block special file; if yes, then the condition becomes true. [ -b \$file ] is false.
-c file Checks if file is a character special file; if yes, then the condition becomes true. [ -c \$file ] is false.
-d file Checks if file is a directory; if yes, then the condition becomes true. [ -d \$file ] is not true.
-f file Checks if file is an ordinary file as opposed to a directory or special file; if yes, then the condition becomes true. [ -f \$file ] is true.
-g file Checks if file has its set group ID (SGID) bit set; if yes, then the condition becomes true. [ -g \$file ] is false.
-k file Checks if file has its sticky bit set; if yes, then the condition becomes true. [ -k \$file ] is false.
-p file Checks if file is a named pipe; if yes, then the condition becomes true. [ -p \$file ] is false.
-t file Checks if file descriptor is open and associated with a terminal; if yes, then the condition becomes true. [ -t \$file ] is false.
-u file Checks if file has its Set User ID (SUID) bit set; if yes, then the condition becomes true. [ -u \$file ] is false.
-r file Checks if file is readable; if yes, then the condition becomes true. [ -r \$file ] is true.
-w file Checks if file is writable; if yes, then the condition becomes true. [ -w \$file ] is true.
-x file Checks if file is executable; if yes, then the condition becomes true. [ -x \$file ] is true.
-s file Checks if file has size greater than 0; if yes, then condition becomes true. [ -s \$file ] is true.
-e file Checks if file exists; is true even if file is a directory but exists. [ -e \$file ] is true.