locate [OPTION]... [PATTERN]...

  -b, --basename         match only the base name of path names

  -c, --count            只输出找到的数量

  -d, --database DBPATH  使用DBPATH指定的数据库，而不是默认数据库 /var/lib/mlocate/mlocate.db

  -e, --existing         only print entries for currently existing files

  -L, --follow           follow trailing symbolic links when checking file existence (default)

  -h, --help             显示帮助

  -i, --ignore-case      忽略大小写

  -l, --limit, -n LIMIT  limit output (or counting) to LIMIT entries

  -m, --mmap             ignored, for backward compatibility

  -P, --nofollow, -H     don't follow trailing symbolic links when checking file existence

  -0, --null             separate entries with NUL on output

  -S, --statistics       don't search for entries, print statistics about eachused database

  -q, --quiet            安静模式，不会显示任何错误讯息

  -r, --regexp REGEXP    使用基本正则表达式

      --regex            使用扩展正则表达式

  -s, --stdio            ignored, for backward compatibility

  -V, --version          显示版本信息

  -w, --wholename        match whole path name (default)

[root@cent6 lib]# locate /etc/my

/etc/my.cnf

[root@cent6 ~]# touch new.txt

[root@cent6 ~]# locate new.txt

[root@cent6 ~]# updatedb

[root@cent6 ~]# locate new.txt

/root/new.txt

[root@cent6 ~]# cat /etc/updatedb.conf

PRUNE_BIND_MOUNTS = "yes"

PRUNEFS = "9p afs anon_inodefs auto autofs bdev binfmt_misc cgroup cifs coda configfs cpuset debugfs devpts ecryptfs exofs fuse fusectl gfs gfs2 hugetlbfs inotifyfs iso9660 jffs2 lustre mqueue ncpfs nfs nfs4 nfsd pipefs proc ramfs rootfs rpc_pipefs securityfs selinuxfs sfs sockfs sysfs tmpfs ubifs udf usbfs"

PRUNENAMES = ".git .hg .svn"

PRUNEPATHS = "/afs /media /net /sfs /tmp /udev /var/cache/ccache /var/spool/cups /var/spool/squid /var/tmp"