Summary of common linux work commands

Summary of common linux work commands-general Linux technology-Linux technology and application information. The following is a detailed description. Linux commands, files, and directory names are case sensitive.

// View historical data

History

History | grep mount

Press "up/down" to select commands previously typed

// Copy an object

Cp/usr/local/tomcat4/temp/func. class/usr/local/tomcat4/webapps/photoblog/WEB-INF/classes/framework/utils/

Cp-Rf/photodataold/data/2005-9-6/photodata/& (directory copy generation & execution in the background)

Rsync-UVR/photodataold/data/photodata (check synchronous copy)

// Enter the Directory

Cd/usr/local/

// Default Chinese characters in the operating system

Export LC_ALL = zh_CN.GB2312

Or export LANG = zh_CN.gb2312

// Move the file

Mv. *. swp 123.bak

// View performance

Top // shift Key + "m" is sorted by "memory"

// View cpu Information

More/proc/cpuinfo

// View system logs

Tail-n 100/var/log/messages | grep squid

// View environment variables

Env

// Browse files and directories

Ls // list; ll // detailed list

// View the current directory

Pwd

// Create a directory

Mkdir

// Create a directory with memory

Mkdir-p/tmp/cache

Mount-t tmpfs-o size = 1512 M, noexec, noatime, noexec none/tmp/cache

// Local Cabinet

Mount/dev/cciss/c1d0p1/data1

// Foreign Cabinet

Mount-t nfs 10.10.4.4:/data2/data2

// Rm cannot be used to remove the mount (the files under the directory are deleted); umount is used.

// Create a connection to point to the name (you can use rm-f to remove it, instead of deleting the file under it)

Ln-s/opt/bokee/java/jdk1.5.0 _ 06/bin/java

// Delete the Directory

Rmdir

// Delete an object

Rm-rf * //-r indicates that files in sub-directories can be deleted.-f does not prompt information.

// View the file

More *. txt

// Edit the file

Vi *. txt

-Insert by pressing the I key

-Press the p key to insert a row in front of it.

-Insert a row after the o key.

-Press esc to exit editing.

-: Number of rows displayed by set nu

-: Q: Exit vi

-: Save wq and exit vi.

"/Character" query character

// Public clipboard with windows

// View tomcat logs

Tail-f catalina. out

// View the processes in use in java

Ps-aux | grep java or ps-ef | grep java

Ps-ef> pid.txt

// Remove the comment to generate the file to 1

Grep-v "#" httpd. conf> 1

// Clear the processes in use in java

Kill-9 30672

Killall squid

// Clear the screen

Clear

// Search for files

Find.-name resin *

// Decompress tar.gz

Tar zxvf resin-2.1.16.tar.gz

// Query Command Parameters

Man tar

// View disk Information

Df-l

Df-h

// View the Folder Information of the Disk

Du-h cache/

Df-k/tmp

// View memory information

Free

// View the startup Service Information

/Sbin/server -- status-all

/Etc/inittab file; 3: start to enter Command Line 5: Start to enter graphical interface

Run the ntsysv command and the xfs service (restart). Type startX in the command line to enter the graphic interface.

Use ctrl + alt + f3 (f5) to switch between the GUI and the command line interface)

// Check whether the global variable path exists

Whereis ..

// View the java version

Java-version

// View the linux version

Uname-

// View the $ path

Echo $ TOMCAT_HOME

// Control the startup Service

Ntsysv

// Re-execute the profile

./Etc/profile or

Srouce/etc/profile

// Check the port

Netstat-lp

// Restart

Reboot

// The file that runs when linux is started

/Etc/profile (equivalent to the windows config. sys file)

/Etc/rc. local (equivalent to the windows autoexec. bat file)

/Etc/init. d/(the program that runs when linux is started under this directory; it is controlled by ntsysv command)

// Set linux threads and processes

Ulimit-a (view)

Ulimit-n 2048 (modify the maximum number of read files)

Ulimit-u (maximum number of processes modified)

// Edit the timer Processor

Crontab-e

0 0 *** (/usr/bin/rdate-s time.sa.bokee.com)

Ntpdate www.freebsd.org // synchronization time

Date // view the time

// Network IP settings

Netconfig

// Reset the NIC. One Nic can be configured with multiple addresses.

Vi/etc/sysconfig/network-scripts/ifcfg-eth0 (1)

Service network restart

// View the NIC Information

Ifconfig

// Configure dns information

Vi/etc/resolv. conf

// Configure gateway Information

Vi/etc/sysconfig/network

# Change the owner of the cache directory to nobody (group: User)

Chown-R nobody: nobody/opt/bokee/cache

# Generate a batch file

Use vi to compile a text file named static. sh, and then execute it directly with sh static. sh.

Grant the File Permission chmod 775 static. sh (the maximum permission is 777; the File Permission just obtained from vi is the least;

You can directly .. /Static. sh executed

# Port Check

Netstat-phosphatase | grep squid

Telnet 192.168.2.3 80 (21 by default)

GET, HTTP, 1.1

Press enter again. If there is any information, it means it is okay.

// Query the IP address of the domain name

Ping botu.bokee.com or

Nslookup botu.bokee.com 211.152.19.73

Decompress: unzip 921-16.jar

View firewall: iptables-L-vn

Firewall start: service iptables start

Disable firewall: service iptables stop

Firewall status: service iptables status

Traffic view: iptraf

// View the last startup time

Uptime

// Obtain the content from the link (-O stores the new file name)

Wget-O squid-2.5.13.tar.gz http://www.squid-cache.org/Versi... 2.5.STABLE13.tar.gz

// User management

Groupadd aa // Add User Group aa

Groupdel aa // delete user group aa

Useradd-g aa bb // Add User bb to user group aa

Userdel bb // delete user bb

Passwd bb // modify the password of user bb