Ubuntu skills Summary

Installation View Software xxx installation content dpkg-Lxxx search software apt-cachesearch Regular Expression find which package the file belongs dpkg-Sfilenameapt-filesearchfilename query software xxx depends on which packages apt-cachedependsxxx query software xxx is what the package depends on apt-cacherdependsxxx and adds a CD source sudoapt-cdromadd system to upgrade su

Install
View the installation content of software xxx
Dpkg-L xxx
Search software
Apt-cache search Regular Expression
Find the package of the file
Dpkg-S filenameapt-file search filename
Queries which packages the software xxx depends on
Apt-cache depends xxx
Queries which packages depend on the software xxx
Apt-cache rdepends xxx
Add a CD Source
Sudo apt-cdrom add
System Upgrade
Sudo apt-get updatesudo apt-get upgradesudo apt-get dist-upgrade
Clear the residual configuration file of the deleted package.
Dpkg-l | grep ^ rc | awk '{print $2}' | tr ["\ n"] [""] | sudo xargs dpkg-P-
Automatic Processing of H files is missing during compilation
Sudo auto-apt run./configure
View the temporary directory for storing downloaded packages during software installation
Ls/var/cache/apt/archives
How to modify the MAC address of a NIC
Sudo ifconfig eth0 down # disable the NIC sudo ifconfig eth0 hw ether 00: AA: BB: CC: DD: EE # change the address sudo ifconfig eth0 up # then start the NIC
Count the number of current IP connections
Netstat-na | grep ESTABLISHED | awk '{print $5}' | awk-F: '{print $1}' | sort | uniq-c | sort-r-nnetstat-na | grep SYN | awk '{print $5}' | awk-F: '{print $1}' | sort | uniq-c | sort-r-n
Count the IP addresses of up to 20000 IP packets in the current 100 IP Packets
Tcpdump-tnn-c 20000-I eth0 | awk-F ". "'{print $1 ". "$2 ". "$3 ". "$4} '| sort | uniq-c | sort-nr | awk' $1> 1000'
Mask IPV6
Echo "blacklist ipv6" | sudo tee/etc/modprobe. d/blacklist-ipv6
Service
Add a service
Sudo update-rc.d service name defaults 99
Delete a service
Sudo update-rc.d service name remove
Temporarily restart a service
/Etc/init. d/service name restart
Temporarily close a service
/Etc/init. d/service name stop
Start a service temporarily
/Etc/init. d/service name start
Set
Configure which Java is used by default
Sudo update-alternatives -- config java
Modify user information
Sudo chfn userid
Set proxy for apt
Export http_proxy = http://xx.xx.xx.xx: xxx
Modify system logon information
Sudo vim/etc/motd
Chinese
Convert the file name from GBK to UTF8
Sudo apt-get install convmvconvmv-r-f cp936-t utf8 -- notest -- nosmart *