added sheets/chmod

sheets/chmod

@@ -0,0 +1,31 @@
+# chmod
+# Change the access permissions of a file or directory.
+
+# Give the [u]ser who owns a file the right to e[x]ecute it:
+chmod u+x file
+
+# Give the [u]ser rights to [r]ead and [w]rite to a file/directory:
+chmod u+rw file_or_directory
+
+# Remove e[x]ecutable rights from the [g]roup:
+chmod g-x file
+
+# Give [a]ll users rights to [r]ead and e[x]ecute:
+chmod a+rx file
+
+# Give [o]thers (not in the file owner's group) the same rights as the [g]roup:
+chmod o=g file
+
+# Remove all rights from [o]thers:
+chmod o= file
+
+# Change permissions recursively giving [g]roup and [o]thers the abililty to [w]rite:
+chmod -R g+w,o+w directory
+
+# Set access rights using numeric (octal) form
+chmod 750 file
+
+# Convert string representation of the access right
+# into numeric form and back
+curl cheat.sh/chmod/750
+curl cheat.sh/chmod/rwxr-x---