Shulou(Shulou.com)06/03 Report--

1. Find all files in the / etc directory that are larger than 1m and whose types are ordinary files

[root@centos7 ~] # find / etc/-type f-size + 1m | xargs ls-lh

-rw-r--r--. 1 root root 1.4M Apr 11 2018 / etc/brltty/zh-tw.ctb

-rw-. 1 root root 3.8M Nov 3 2018 / etc/selinux/targeted/active/policy.kern

-rw-r--r--. 1 root root 1.4M Nov 3 2018 / etc/selinux/targeted/contexts/files/file_contexts.bin

-rw-r--r--. 1 root root 3.8M Nov 3 2018 / etc/selinux/targeted/policy/policy.31

-Rafael, Rafe, Rafael. 1 root root 7.8M Jan 4 15:58 / etc/udev/hwdb.bin

[root@centos7 ~] #

2. Package all the files at the end of conf under the / etc/ directory. The compressed package name is the time of the day, and copy it to the / usr/localsrc directory for backup.

[root@centos7 ~] # tar-zvcf `date +% F`.tar.gz / etc/*.conf & & cp `date +% F`.tar.gz / usr/local/src/

Tar: Removing leading `/ 'from member names

/ etc/asound.conf

/ etc/autofs.conf

/ etc/autofs_ldap_auth.conf

/ etc/brltty.conf

3. Use sed to retrieve the IPv4 address of the local machine in the ifconfig command

[root@centos7 ~] # ifconfig ens160 | sed-nr '2s/ ^ [^ 0-9] + ([0-9.] +).

10.0.1.109

[root@centos7 ~] #

4. Delete all # and white space characters beginning with # followed by at least one white space character in the / etc/fstab file

[root@centos7 ~] # sed-r's / ^ # + (. *) /\ 1Universe'/ etc/fstab

#

/ etc/fstab

Created by anaconda on Sat Jan 4 01:52:46 2020

#

Accessible filesystems, by reference, are maintained under'/ dev/disk'

See man pages fstab (5), findfs (8), mount (8) and/or blkid (8) for more info

#

/ dev/mapper/centos-root / xfs defaults 0 0

UUID=24b6bae0-d077-4259-8529-f778c9c120ce / boot xfs defaults 0 0

/ dev/mapper/centos-swap swap swap defaults 0 0

5. Deal with the / etc/fstab path and use the sed command to extract its directory name and base name

[root@centos7 ~] # echo / etc/fstab | sed-nr's @ (/. *) / (. *) @\ 1roomp'

/ etc

[root@centos7 ~] # echo / etc/fstab | sed-nr's @ (/. *) / (. *) @\ 2roomp'

Fstab

[root@centos7 ~] #

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