Man Pages – Linux Manual Pages

open, creat – open and possibly create a file or device
USAGE
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int open(const char *pathname, int flags);
int open(const [...]

chacl – change the access control list of a file or directory
USAGE
chacl acl pathname…
chacl -b acl dacl pathname…
chacl -d dacl pathname…
chacl -R pathname…
[...]

at – execute commands at a later time
USAGE at [-V] [-q queue] [-f file] [-mldbv] TIME at [-V] [-q queue] [-f file] [-mldbv] -t time_arg at -c job [job...] atq [-V] [...]