[root@hadoop01 ~]# whereis cat
cat: /bin/cat /usr/share/man/man1/cat.1.gz
[root@hadoop01 ~]# yum install mlocate
已加载插件：fastestmirror
设置安装进程
Loading mirror speeds from cached hostfile
* base: mirror.bit.edu.cn
* extras: mirror.bit.edu.cn
* updates: mirror.bit.edu.cn
base | 3.7 kB 00:00
extras | 3.4 kB 00:00
updates | 3.4 kB 00:00
updates/primary_db | 1.2 MB 00:01
解决依赖关系
--> 执行事务检查
---> Package mlocate.x86_64 0:0.22.2-6.el6 will be 安装
--> 完成依赖关系计算
依赖关系解决
===========================================================================================================================================================================
软件包 架构 版本 仓库 大小
===========================================================================================================================================================================
正在安装:
mlocate x86_64 0.22.2-6.el6 base 86 k
事务概要
===========================================================================================================================================================================
Install 1 Package(s)
总下载量：86 k
Installed size: 279 k
确定吗？[y/N]：y
下载软件包：
mlocate-0.22.2-6.el6.x86_64.rpm | 86 kB 00:00
运行 rpm_check_debug
执行事务测试
事务测试成功
执行事务
正在安装 : mlocate-0.22.2-6.el6.x86_64 1/1
Verifying : mlocate-0.22.2-6.el6.x86_64 1/1
已安装:
mlocate.x86_64 0:0.22.2-6.el6
完毕！
[root@hadoop01 ~]# locate udisk
locate: can not stat () `/var/lib/mlocate/mlocate.db': 没有那个文件或目录
[root@hadoop01 ~]# locate abc.txt
locate: can not stat () `/var/lib/mlocate/mlocate.db': 没有那个文件或目录
[root@hadoop01 ~]# updatedb
[root@hadoop01 ~]# locate abc.txt
/mnt/udisk/abc.txt
[root@hadoop01 ~]# locate udisk
/mnt/udisk
/mnt/udisk/abc.txt
[root@hadoop01 ~]#
[root@hadoop01 ~]# echo $PATH
/opt/jdk1.8/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
[root@hadoop01 ~]# which PATH
/usr/bin/which: no PATH in (/opt/jdk1.8/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin)
[root@hadoop01 ~]# ll -a /bin
总用量 6308
dr-xr-xr-x. 2 root root 4096 7月 28 19:57 .
dr-xr-xr-x. 22 root root 4096 8月 31 06:12 ..
-rwxr-xr-x. 1 root root 24232 3月 23 2017 arch
lrwxrwxrwx. 1 root root 4 7月 28 19:56 awk -> gawk
-rwxr-xr-x. 1 root root 23720 3月 23 2017 basename
-rwxr-xr-x. 1 root root 906568 3月 23 2017 bash
-rwxr-xr-x. 1 root root 45224 3月 23 2017 cat
-rwxr-xr-x. 1 root root 52936 3月 23 2017 chgrp
-rwxr-xr-x. 1 root root 48712 3月 23 2017 chmod
-rwxr-xr-x. 1 root root 53640 3月 23 2017 chown
-rwxr-xr-x. 1 root root 116824 3月 23 2017 cp
-rwxr-xr-x. 1 root root 129992 3月 22 2017 cpio
-rwxr-xr-x. 1 root root 41704 3月 23 2017 cut
-rwxr-xr-x. 1 root root 106216 10月 17 2012 dash
-rwxr-xr-x. 1 root root 55576 3月 23 2017 date
-rwxr-xr-x. 1 root root 9144 4月 22 2015 dbus-cleanup-sockets
-rwxr-xr-x. 1 root root 339080 4月 22 2015 dbus-daemon
-rwxr-xr-x. 1 root root 13792 4月 22 2015 dbus-monitor
-rwxr-xr-x. 1 root root 17336 4月 22 2015 dbus-send
-rwxr-xr-x. 1 root root 6776 4月 22 2015 dbus-uuidgen
-rwxr-xr-x. 1 root root 52720 3月 23 2017 dd
-rwxr-xr-x. 1 root root 90544 3月 23 2017 df
-rwxr-xr-x. 1 root root 6736 3月 22 2017 dmesg
lrwxrwxrwx. 1 root root 8 7月 28 19:56 dnsdomainname -> hostname
lrwxrwxrwx. 1 root root 8 7月 28 19:56 domainname -> hostname
-rwxr-xr-x. 1 root root 78504 11月 12 2010 dumpkeys
-rwxr-xr-x. 1 root root 24136 3月 23 2017 echo
lrwxrwxrwx. 1 root root 4 7月 28 19:56 egrep -> grep
-rwxr-xr-x. 1 root root 23832 3月 23 2017 env
lrwxrwxrwx. 1 root root 2 7月 28 19:56 ex -> vi
-rwxr-xr-x. 1 root root 21112 3月 23 2017 false
lrwxrwxrwx. 1 root root 4 7月 28 19:56 fgrep -> grep
-rwxr-xr-x. 1 root root 234512 3月 1 2016 find
-rwxr-xr-x. 1 root root 36392 3月 22 2017 findmnt
-rwxr-xr-x. 1 root root 375616 11月 10 2015 gawk
-rwxr-xr-x. 1 root root 163696 3月 22 2017 grep
lrwxrwxrwx. 1 root root 3 7月 28 19:56 gtar -> tar
-rwxr-xr-x. 1 root root 61 3月 22 2017 gunzip
-rwxr-xr-x. 1 root root 64688 3月 22 2017 gzip
-rwxr-xr-x. 1 root root 13880 3月 22 2017 hostname
-rwxr-xr-x. 1 root root 11264 3月 23 2017 ipcalc
lrwxrwxrwx. 1 root root 41 7月 28 19:57 iptables-xml -> /etc/alternatives/bin-iptables-xml.x86_64
lrwxrwxrwx. 1 root root 20 7月 28 19:57 iptables-xml-1.4.7 -> /sbin/iptables-multi
-rwxr-xr-x. 1 root root 7920 11月 12 2010 kbd_mode
-rwxr-xr-x. 1 root root 11576 3月 22 2017 kill
-rwxr-xr-x. 1 root root 23720 3月 23 2017 link
-rwxr-xr-x. 1 root root 45664 3月 23 2017 ln
-rwxr-xr-x. 1 root root 108248 11月 12 2010 loadkeys
-rwxr-xr-x. 1 root root 11608 3月 22 2017 logger
-rwxr-xr-x. 1 root root 28072 3月 22 2017 login
-rwxr-xr-x. 1 root root 109208 3月 23 2017 ls
-rwxr-xr-x. 1 root root 55336 3月 22 2017 lsblk
-rwxr-xr-x. 1 root root 45384 3月 23 2017 mkdir
-rwxr-xr-x. 1 root root 28568 3月 23 2017 mknod
-rwxr-xr-x. 1 root root 33544 3月 23 2017 mktemp
-rwxr-xr-x. 1 root root 35928 3月 22 2017 more
-rwsr-xr-x. 1 root root 77560 3月 22 2017 mount
-rwxr-xr-x. 1 root root 6728 7月 24 2015 mountpoint
-rwxr-xr-x. 1 root root 106912 3月 23 2017 mv
-rwxr-xr-x. 1 root root 123360 3月 22 2017 netstat
-rwxr-xr-x. 1 root root 25208 3月 23 2017 nice
lrwxrwxrwx. 1 root root 8 7月 28 19:56 nisdomainname -> hostname
-rwsr-xr-x. 1 root root 38520 3月 22 2017 ping
-rwsr-xr-x. 1 root root 36488 3月 22 2017 ping6
-rwxr-xr-x. 1 root root 31776 3月 22 2017 plymouth
-rwxr-xr-x. 1 root root 85304 3月 22 2017 ps
-rwxr-xr-x. 1 root root 28008 3月 23 2017 pwd
-rwxr-xr-x. 1 root root 8184 3月 22 2017 raw
-rwxr-xr-x. 1 root root 36360 3月 23 2017 readlink
-rwxr-xr-x. 1 root root 53592 3月 23 2017 rm
-rwxr-xr-x. 1 root root 36888 3月 23 2017 rmdir
-rwxr-xr-x. 1 root root 20392 5月 11 2016 rpm
lrwxrwxrwx. 1 root root 2 7月 28 19:56 rvi -> vi
lrwxrwxrwx. 1 root root 2 7月 28 19:56 rview -> vi
-rwxr-xr-x. 1 root root 69624 6月 22 2012 sed
-rwxr-xr-x. 1 root root 37448 11月 12 2010 setfont
lrwxrwxrwx. 1 root root 4 7月 28 19:56 sh -> bash
-rwxr-xr-x. 1 root root 24264 3月 23 2017 sleep
-rwxr-xr-x. 1 root root 93496 3月 23 2017 sort
-rwxr-xr-x. 1 root root 61320 3月 23 2017 stty
-rwsr-xr-x. 1 root root 34904 3月 23 2017 su
-rwxr-xr-x. 1 root root 21896 3月 23 2017 sync
-rwxr-xr-x. 1 root root 390616 7月 12 2016 tar
-rwxr-xr-x. 1 root root 11352 3月 22 2017 taskset
-rwxr-xr-x. 1 root root 47928 3月 23 2017 touch
-rwxr-xr-x. 1 root root 11440 3月 22 2017 tracepath
-rwxr-xr-x. 1 root root 12304 3月 22 2017 tracepath6
-rwxr-xr-x. 1 root root 21112 3月 23 2017 true
-rwsr-xr-x. 1 root root 53480 3月 22 2017 umount
-rwxr-xr-x. 1 root root 24232 3月 23 2017 uname
-rwxr-xr-x. 1 root root 2555 11月 12 2010 unicode_start
-rwxr-xr-x. 1 root root 363 11月 12 2010 unicode_stop
-rwxr-xr-x. 1 root root 22216 3月 23 2017 unlink
-rwxr-xr-x. 1 root root 6736 3月 23 2017 usleep
-rwxr-xr-x. 1 root root 907248 12月 22 2016 vi
lrwxrwxrwx. 1 root root 2 7月 28 19:56 view -> vi
lrwxrwxrwx. 1 root root 8 7月 28 19:56 ypdomainname -> hostname
-rwxr-xr-x. 1 root root 62 3月 22 2017 zcat
[root@hadoop01 ~]# which cat
/bin/cat
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