cssh

, by default a set of host lists can be written to a file and placed on the local host's ~/.dsh/group or/etc/dsh/ Group directory, so that it can be called by the "-G" parameter. For example: Pdsh-r ssh-g userhosts "Date", where "userhosts" is a host list file that can be placed in ~/.dsh/group or/etc/dsh/group directory -X This parameter is used to exclude all hosts within a specified group and is often used with the "-a" parameter. For example:Pdsh-r ssh-a-X userhosts "date"-Q This parameter

/home/foo.txt2. pslurp Role: Copy files from multiple remote machines to a Local Machine Example: $ pslurp -h hosts.txt /etc/hosts local_dir3. pnuke Role: Killing processes on remote hosts in parallel Example: $ pnuke -h hosts.txt -l root java4. prsync Purpose: Use rsync to synchronize data from a local computer to a remote host. Example: $ prsync -r -h hosts.txt foo /home/fooReferences Http://www.opstool.com/article/266 Http://linux.die.net/man/1/pssh How to manage multiple servers at the same

No paid Red Hat system can not perform yum online installation, more depressed, existing a very useful cluster software clusterssh. The steps to install and then use on a red hat are as follows: 1, Installation: The Red Hat 6.3 version installs some packages, which are placed on top of my csdn and are stamped here for download. These packages are then installed in the order of dependencies. 2, use: Write configuration in/etc/clusters, such as Hadoop 10.11.1.190 10.11.1.191, and then start

Original article: http://liang3391.blog.51cto.com/178205/732100 Reference: http://www.ibm.com/developerworks/cn/aix/library/au-spunix_remoteserver/index.html If you want to execute a command to thousands of servers simultaneously, copy a file, and kill a process, what tools can be used to simplify O M management? In small-scale use, I use for loop, which has a large quantity. On the one hand, I am not sure whether the operation is successful. On the other hand, the for loop statement has po

1, free of dense scenesMany users and scenarios are required to implement a user-free login between machines. such as Hadoop clusters, Oracle RAC, and so on.2, general operation-----This method is the simplest and direct, but it is between 2 pointsMachine a:192.168.1.1Machine b:192.168.1.2Requirements: Required on machine A can use the root user-free login to machine B (Note that this is also used to log on the root user)Steps:(1), create your own SSH key on machine ASsh-keygen-t rsa-p ' All the

row number SEQ: print the row number BC: Calculator Factor: the factor that outputs an integer. The factor outputs an integer prime factor. NC: Network debugging and Data Transmission DD: move data between files and devices File: determines the type of a file. Stat: view the File status Tac: output file content from the last line, which is opposite to CAT output Shuf: randomly selects data for a file by row. COMM: compare an ordered file by row HD and BVI: outputs or edits binary fil

of a "binary" file; BVI,Binary file editor; Strings,Display printable characters in the file; Tr,You can quickly implement simple character conversion. You can also delete the specified sub-string in the string and merge repeated strings in the string; Iconv,Converts a specified file from one encoding to another. Split,You can cut a file into smaller ones. Each 1000 rows can be cut into a smaller one by default; Csplit,After the files are cut according to the specified template styl

Two days ago, the "some little-known but interesting Unix/Linux commands" series were released.Article, Received praise from some friends. (I wanted to write "a lot of friends", but I thought Linux was really a small crowd, so brother D would not be forced! Haha) D. Will make persistent efforts. The links to the first two articles are as follows: Some little-known but interesting Unix/Linux commands (1) Some little-known but interesting Unix/Linux commands (2) In the third artic

Ldd: View dynamic library information Nm: view the symbol table in the target file AB: website server stress testing tool Strace: Debug System calls Mtr: a better route tracking tool for network debugging Cssh: visual concurrent shell Wireshark and tshark: packet capture and network debugging Host and dig: find DNS Lsof: View process file descriptors and socket information Dstat: a useful statistical tool for system data. Iostat: CPU and d

the factor output as an integer NC: Network debugging and data transmission DD: Move data between files and devices File: Determine the type of a document Stat: View file status TAC: Output The file contents from the last line, and the cat output is the opposite Shuf: Random selection of data on a file by row Comm: Compare an ordered file by row HD and BVI: Output or edit binary files Strings: Viewing the contents of a binary file TR: Character translation or manipulation of

debugging and data transmission socat: Socket broker, with netcat similar slurm: Network Visualization dd: Transferring data between files or devices file: Determine file type tree: Displays the path and file as a tree, similar to the recursivels stat: File information tac: Reverse Output file shuf: Select a few lines randomly in the file comm: A row of rows comparing a sorted file pv: Monitor data through the pipeline hdand bvi : Save or edit a binary file strings: Extr

named these nodes N1, N2 、... N5, and established DNS and host operating systems between them. In order to create a partition, you need some way to cut or delay messages, such as firewall rules. On Linux, you can use the Iptables-a input-s some-peer-j drop command to create a one-way partition in which messages from certain nodes to the current node are cut off. When you apply these rules to multiple hosts, you create an artificial pattern of network data loss. Running these commands repeated