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This article is to share with you what are the common commands of operation and maintenance. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Common command

1. Exclude logs and temp directories when packing and compressing

# tar-zcvf tomcat-creditcm.tar.gz-exclude=logs-exclude=temp tomcat-creditcm

two。 Use the rsync command to copy only the directory structure, not the files in the directory

# rsync-avH-include "* /"-- exclude "*" / opt/nagios.

3. Copy a large number of files

# find / app/jboss-ruleengine/businessdata20130704/certification/2013-07-04 /-type f | xargs-I-N1 cp {}.

4. Bag grab command

Tcpdump-I eth0-X-s 0-A host 10.150.180.81-w succ20140122

Tcpdump-I eth0-X-s 0-A host 10.150.180.81-r succ20140122 > succ

5. View all living hosts:

Nmap-sP 10.151.10.amp 24 | grep up

6. View all hosts:

Nmap-sP-v 10.151.10.0Universe 24

7. See which directories are shared on the nfs server

# showmount-e 192.168.5.12

Export list for 192.168.5.12:

/ usr/local/apache2/htdocs/VIDEO_TEMP *

8. Displays the client ip of the nfs server already on mount

# showmount-a 192.168.5.12

9. Which software package is installed for a program?

# rpm-qf / bin/bash

Bash-3.2-24.el5

10. Where are the files in a package installed?

# rpm-ql bash-3.2-24.el5

11. An uninstalled software package, using the

# rpm-qlp glib2-2.22.5-5.el6.i686.rpm

12.lvm command:

Add 20g of space to the partition:

# lvextend-L + 20g / dev/mapper/vg-LogVol03

# resize2fs / dev/mapper/vg-LogVol03

Add Partition:

1. Create lv Partition 100G lv data is the partition name, and VolGroup00 is the volume group name

Lvcreate-L 100G-n data VolGroup00

two。 Format lv partitions into ext3 format

Mkfs.ext3 / dev/VolGroup00/data

3. Mount the partition to / data

Mount / dev/VolGroup00/data / data

Increase the swap partition size:

Check cat / proc/swaps and find that the size is not enough. Use the following method to enlarge the partition

1. Swapoff / dev/mapper/rootvg-swaplv

two。 Lvextend-L + 45G / dev/mapper/rootvg-swaplv

3. Mkswap / dev/mapper/rootvg-swaplv

4. Swapon / dev/mapper/rootvg-swaplv

Reduce partition siz

1. Umount partition first

# umount / ynd

two。 Reduce partition size 25G space

# lvreduce-L-25g / dev/rootvg/ynd

13. Memory output

Jmap-histo 19992

14. Linux obtains the local export ip

1. Curl ifconfig.me

# or

two。 Curl http://members.3322.org/dyndns/getip

15. Combined with ping tracert to determine the relevant characteristics of the network, this command is mtr

# mtr-rn 10.151.20.23

Thank you for reading! This is the end of this article on "what are the common commands of operation and maintenance?". I hope the above content can be helpful to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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