课程第17次

botang

2019-05-19
逻辑卷相同的写法：
/dev/mapper/vg_install-lv_home/   === /dev/vg_install/lv_home

kvm虚拟机的盘/dev/vda...                                   xen虚拟机的盘/dev/xvda...
如果要跨设备做硬链接，那么：

1. [root@station60 ~]# ln anaconda-ks.cfg  /mnt/anaconda-ks2.cfg
   
2. ln: failed to create hard link ‘/mnt/anaconda-ks2.cfg’ => ‘anaconda-ks.cfg’: Invalid cross-device link
   
3. [root@station60 ~]# cd /mnt
   
4. [root@station60 mnt]# ls
   
5. lost+found
   
6. [root@station60 mnt]# touch anaconda-ks2.cfg
   
7. [root@station60 mnt]# cd
   
8. [root@station60 ~]# ls
   
9. anaconda-ks.cfg  a.txt  Desktop  Documents  Downloads  initial-setup-ks.cfg  labs  Music  Pictures  Public  rpmbuild  Templates  Videos
   
10. [root@station60 ~]# mount  --bind anaconda-ks.cfg  /mnt/
    
11. anaconda-ks2.cfg  lost+found/      
    
12. [root@station60 ~]# mount  --bind anaconda-ks.cfg  /mnt/anaconda-ks2.cfg
    
13. [root@station60 ~]# cd /mnt
    
14. [root@station60 mnt]# ls
    
15. anaconda-ks2.cfg  lost+found
    
16. [root@station60 mnt]# vim anaconda-ks2.cfg
    
17. [root@station60 mnt]# ls -i anaconda-ks2.cfg
    
18. 33574992 anaconda-ks2.cfg
    
19. [root@station60 mnt]# ls -i /root/anaconda-ks.cfg
    
20. 33574992 /root/anaconda-ks.cfg
    

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对比一下grep -r：

1. [root@station60 etc]# grep  --color  -r updatedb   ./
   
2. ./cron.daily/mlocate:/usr/bin/updatedb -f "$nodevs"
   
3. ./selinux/targeted/contexts/files/file_contexts:/usr/bin/updatedb.*        --        system_u:object_r:locate_exec_t:s0
   
4. Binary file ./selinux/targeted/contexts/files/file_contexts.bin matches
   
5. ./selinux/targeted/active/file_contexts:/usr/bin/updatedb.*        --        system_u:object_r:locate_exec_t:s0
   
6. ./sudoers:# Cmnd_Alias LOCATE = /usr/bin/updatedb
   

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关于RHEL7  RH124 P353的单引号：

1. #!/bin/sh
   
2. 
   
3. read -p "Pls input what do want to  find?: "  MYFND
   
4. 
   
5. find / -name '$MYFND'
   

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1. #!/bin/sh
   
2. 
   
3. read -p "Pls input what do want to  find?: "  MYFND
   
4. 
   
5. find / -name "$MYFND"

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[root@station60 ~]# ./1.sh
Pls input what do want to  find?: a.txt
[root@station60 ~]# vi 1.sh
[root@station60 ~]# ./1.sh
Pls input what do want to  find?: a.txt
/root/a.txt

在man find的时候，搜索-i.../\-i

找到了-inum，举个例子：

1. find  / -inum 51620756

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RH124 P355：

1. find / -user root -group mail 2>/dev/null

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与下面这条命令等价：

1. find / -user root  -a   -group mail 2>/dev/null
   

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一个相对复杂的例子：

1. find / \( ! -user root  -a   -group mail \)  -o  \( -perm  1777 -a  -type d \)    2>/dev/null
   
2. /dev/mqueue
   
3. /dev/shm
   
4. /var/tmp
   
5. /var/tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-rtkit-daemon.service-Bwn1dH/tmp
   
6. /var/tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-bolt.service-n4k8OH/tmp
   
7. /var/tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-colord.service-cXOTvV/tmp
   
8. /var/tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-chronyd.service-53kvac/tmp
   
9. /var/tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-rtkit-daemon.service-Rj9tdi/tmp
   
10. /var/tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-cups.service-dtaLzq/tmp
    
11. /var/tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-bolt.service-mlcgv6/tmp
    
12. /var/tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-colord.service-hESX1M/tmp
    
13. /var/tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-fwupd.service-myYryr/tmp
    
14. /var/tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-rtkit-daemon.service-LHQmRy/tmp
    
15. /var/tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-chronyd.service-YrgDso/tmp
    
16. /var/tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-cups.service-ilgZY5/tmp
    
17. /var/tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-bolt.service-zlAGWI/tmp
    
18. /var/tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-colord.service-edBOIi/tmp
    
19. /var/tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-cups.service-uGftV4/tmp
    
20. /var/tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-fwupd.service-cnCsBc/tmp
    
21. /var/spool/mail/rpc
    
22. /var/spool/mail/student
    
23. /tmp
    
24. /tmp/.ICE-unix
    
25. /tmp/.X11-unix
    
26. /tmp/.XIM-unix
    
27. /tmp/.font-unix
    
28. /tmp/.Test-unix
    
29. /tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-fwupd.service-0zDd1f/tmp
    
30. /tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-bolt.service-HFNoCw/tmp
    
31. /tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-colord.service-w5iYWR/tmp
    
32. /tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-cups.service-koA7u1/tmp
    
33. /tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-bolt.service-5fEpCi/tmp
    
34. /tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-chronyd.service-2Pv1q9/tmp
    
35. /tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-fwupd.service-rxM7b5/tmp
    
36. /tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-rtkit-daemon.service-9CYYbf/tmp
    
37. /tmp/systemd-private-3a18d86c83ae4176a15ef08834c46d31-colord.service-kD7yLW/tmp
    
38. /tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-rtkit-daemon.service-3p8gom/tmp
    
39. /tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-bolt.service-6wLctG/tmp
    
40. /tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-chronyd.service-bzEXjb/tmp
    
41. /tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-cups.service-D7dcLu/tmp
    
42. /tmp/systemd-private-2815a723c0f04a8c976237997cb924dd-colord.service-JRTsP0/tmp
    
43. /tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-cups.service-4e0VMs/tmp
    
44. /tmp/systemd-private-4ebe4ae4397b4c52aab071bcdfc903a1-rtkit-daemon.service-LwaPxK/tmp
    
45. [root@station60 ~]#
    

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1. [root@station60 labs2]# find ./ -perm  442
   
2. ./a.txt
   
3. [root@station60 labs2]# find ./ -perm  /442
   
4. ./
   
5. ./a.txt
   
6. ./b.txt
   
7. [root@station60 labs2]# find ./ -perm  -442
   
8. ./a.txt
   
9. ./b.txt
   
10. [root@station60 labs2]# touch c.txt
    
11. [root@station60 labs2]# chmod 440  c.txt
    
12. [root@station60 labs2]# find ./ -perm  -442
    
13. ./a.txt
    
14. ./b.txt
    
15. [root@station60 labs2]# find ./ -perm  /442
    
16. ./
    
17. ./a.txt
    
18. ./b.txt
    
19. ./c.txt
    
20. [root@station60 labs2]# 类似 select    where  all/any

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关于搜索的层数：

1. [root@station60 ~]# find / -iname "*message*" -maxdepth 3
   
2. find: warning: you have specified the -maxdepth option after a non-option argument -iname, but options are not positional (-maxdepth affects tests specified before it as well as those specified after it).  Please specify options before other arguments.
   
3. 
   
4. /var/log/messages-20190510
   
5. /var/log/messages-20190512
   
6. /var/log/messages
   
7. /usr/bin/sdp_long_message
   
8. /usr/bin/metacity-message
   
9. [root@station60 ~]# find /  -maxdepth 3   -iname "*message*"
   
10. /var/log/messages-20190510
    
11. /var/log/messages-20190512
    
12. /var/log/messages
    
13. /usr/bin/sdp_long_message
    
14. /usr/bin/metacity-message
    

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