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Linux NC command Details

Source-rou Ting Pointer:4, 8, ...-H help information-i secs time-out interval-l listening mode, for inbound connection-n Specifies the IP address of the number, cannot be transmitted with the Hostname-o file 16-in-port port local port number -R arbitrarily specify local and remote port-S addr Local Source address-u UDP mode-v Verbose output--with two-V to get more detailed content----secs timeout time-Z turns the input and output off-when used for scanning, where the port number can specify one

Ubuntu-14.04 under Installation TinyOS-2.1.2

Reference: http://tinyos.stanford.edu/tinyos-wiki/index.php/Installing_TinyOS_2.1.11. Update the sourceAdd the following line to the/etc/apt/sources.listDeb Http://tinyos.stanford.edu/tinyos/dists/ubuntu Lucid Main2. Perform the update$ sudo apt-get update3. Install TinyOS and all support Tools$ sudo apt-get install tinyos-2.1.2A long wait ....4. Setting Environment variablesSince tinyos-2.1.2 below does not tinyos.sh this file, now create a new one.cd /opt/tinyos-2.1.2sudo vim tinyos.sh (或者使用

is the NC test port open in Linux?

--with two-V to get more detailed content----secs timeout time-Z turns the input and output off-when used for scanning, where the port number can specify one or a specified range of Lo-hi.9, 1.84 version of the parameters introduction1. NC [ -46DDHKLNRSTUUVZC] [-I interval] [-P Source_port]2. [-S source_ip_address] [-T ToS] [-WTimeout] [-X proxy_protocol] [-x3. proxy_address[:p ORT] [hostname] [Port[s]]1. -4Force the use of IPv42. -6Force the use of I

Record a magical operation in Python, increment the value of a tuple that contains a list, assign it successfully, but also reported the error

, Use __add__ .What is the difference between the two? With a list of examples a+=b, using __add__ is like using a.extend(b) , if you use __add__ , the a = a+b former is directly on the original list to expand, and the latter is to first remove the value from the original list , expand in a new list, and then return the new list object to the variable, obviously the latter is much more expensive.Continue to take that magical operation.Now that we know the variable assignment, we can go a little

Android Call system email multiple attachments

Invoking other programs in Android for related processing is the intent used. Of course, email is no exception.In Android, there are three types of intent that call email:Intent.action_sendto Send without attachmentIntent.action_send Send with AttachmentIntent.action_send_multiple Send with multiple attachments Of course, the so-called call email, just say that email can receive intent and do these things, may also have other applications to implement the relevant functions, so in the execution

Linux ICMP Learning notes one of the ICMP protocol-related formats __linux

Set * * * #define ICMP_SR_FAILED5/* Source Route Failed * * #define Icmp_net_unknown6 #define ICMP_HOST_UNKNOWN7 #define Icmp_host_isolated8 #define Icmp_net_ano9 #define Icmp_host_ano10 #define ICMP_NET_UNR_TOS11 #define ICMP_HOST_UNR_TOS12 #define ICMP_PKT_FILTERED13/* Packet Filtered * * #define ICMP_PREC_VIOLATION14/* Precedence violation * * #define ICMP_PREC_CUTOFF15/* Precedence cut off * * #define NR_ICMP_UNREACH15/* Instead of hardcoding immediate value * * c) redirect TY

Routing filtering Command Route-map detailed

172.16.1.4 255.255.255.0 IP policy route-map sense!ip Local policy Route-map Ss-list permit IP any 172.16.1.0 0.0.0.255access-list permit OSPF any ANY!ROUTE-MAP sense permit match IP add Ress sense Permit Match length 1000 1600 set IP next-hop 172.16.2.1!route-map sense permit Match Length 0 Set IP next-hop 172.16.3.1Note: If there is no first route-map entry, the packets of router itself and the packets of OSPF will be forwarded to the wrong address because of the latter two ROUTE-MAP statemen

Create SPFile to ASM in Oracle

--View SID Sql> show parameter instance_name; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ Instance_name String tos --Create Pfile sql> create pfile= '/tmp/tospfile ' from SPFile; File created. --Create SPFile in ASM sql> create spfile= ' +data ' from pfile= '/tmp/tospfile '; File created. --View SPFile name in ASM asmcmd> pwd +data/tos/paramet

Remember database transaction lock once

Tags: item UI table lock using NSA OLA scope action thingRecently encountered a problem in the project, transaction lock.Transactionoptions tos = new Transactionoptions ();Tos. IsolationLevel = Isolationlevel.repeatableread; A row lock locks only the row of data for the current operation, and other data for the current table is not affected. (verified)isolationlevel.serializable; Table lock the current oper

[Turn] Linux grab tool tcpdump detailed

statements such as and, or, not, to help you get rid of useless information. # TCPDUMP-VV tcpdump:listening on eth0, Link-type EN10MB (Ethernet), capture size bytes 11:53:21.4 44591 IP (Tos 0x10, TTL 64, id 19324, offset 0, flags [DF], Proto 6, length:92) asptest.localdomain.ssh > 192.16 8.228.244.1858:p 3962132600:3962132652 (*) Ack 2726525936 win 1266 asptest.localdomain.1077 > 192.168.228.153. Domain: [bad udp cksum 166e!] 325+ PTR? 244.228.1

Java Send mail sample

Importjava.io.IOException;2 ImportJava.util.*;3 4 ImportJavax.mail.*;5 Importjavax.mail.internet.*;6 Importjavax.activation.*;7 8 Public classSendmailutil {9 Ten StaticString HOST = "";//SMTP Server One StaticString from = "";//Sender Address A StaticString to = "";//Recipient Address - StaticString affix = "";//Attachment Address - StaticString affixname = "";//Attachment name the StaticString USER = "";//User name - StaticString PWD = "";//163 of the Authorization

Super Detailed introduction to Iptables

deficiencies of .1. speed 5.2. restore 5.3. iptables-save 5.4. iptables-restore 6. rules are the basis of 6.1. 6.2. Tables 6.3. Commands 6.4. matches 6.4.1. Universal matching 6.4.2. implicit matching 6.4.3. explicit matching 6.4.4.nbs P Matching for abnormal packets 6.5. targets/jumps 6.5.1. ACCEPT target 6.5.2. dnat target 6.5.3. DROP target 6.5.4.nbs P LOG target 6.5.5. MARK target 6.5.6. masquerade target 6.5.7. MIRROR target 6.5.8. QUEUE target 6. 5.9. REDIRECT Target 6.5.10. REJECT target

Summary of related network commands commonly used in DOS _dos/bat

Displays addresses and port numbers in numeric format (instead of trying to find names). -S Displays statistics for each protocol. By default, statistics for TCP, UDP, ICMP, and IP are displayed. The-p option can be used to specify a default subset. -P Protocol Displays the connection to the protocol specified by protocol; Protocol can be TCP or UDP. If you use the-S option to display statistics for each protocol, protocol can be TCP, UDP, ICMP, or IP. -R Displays the contents of the routing ta

Go A detailed analysis of flow classification for IP QoS

Recently in the QoS, see an article, good. =========================================== A detailed analysis of flow classification for IP QoS[Url]www.net130.com[/url] Date: 2007-11-18 views: 3337Source: Blog.sina.com.cn/stimwoo Last and colleagues discussed the priority of QoS traffic and protocol traffic. Later found this article. Special forwarding.In RFC 791, the IP precedence of the TOS bit is divided into 8 priorities, which can be applied to the

Iptables Guide 1.1.19

restore 5.3. Iptables-save 5.4. Iptables-restore 6. The rule is how to practice 6.1. Foundation 6.2. Tables 6.3. Commands 6.4. Matches 6.4.1. Universal matching 6.4.2. Implicitly matching 6.4.3. An explicit match 6.4.4. Match for an abnormal packet 6.5. Targets/jumps 6.5.1. ACCEPT Target 6.5.2. Dnat Target 6.5.3. DROP Target 6.5.4. LOG Target 6.5.5. MARK Target 6.5.6. Masquerade Target 6.5.7. MIRROR Target 6.5.8. QUEUE Target 6.5.9. REDIRECT Target 6.5.10. REJECT Target 6.5.11. return target 6.

Chromium Download Compilation process

=c:\depot_tools\http_proxy.boto /////////////////////////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////// Download and compile /////////////////////////////////////////////////////////////////////////////////////////////////////////////// 1, refer to the official download Note: Http://www.chromium.org/developers/how-tos/get-the-code The simple point is to run directly: Fetch chromium I

Four network test tools built into the system

as follows: ping [-t] [-a] [-N Count] [-l-length] [-f] [-i TTL] [-v TOS] [R Count] [s count] [[-j-host list] | [k Host-list]] [-w timeout] Destination-list From this command to see how complex it is, the ping command itself is followed by its execution parameters, now give a detailed explanation of its parameters! -t-has this parameter, when you ping a host system will not stop running ping This command, until you press CONTROL-C. -a-the NetBIOS

Iptables setting graphic Details

NetFilter contains three kinds of tables, and three types of tables contain five kinds of chains, and the chain contains various rules. That is, the table contains several chains, and the chain contains several rules. (a) Three types of tables are: Filter Nat mangle 1. Filter: Handle the packet related to the machine, is the default table, contains three kinds of chains: input output forward 2. Nat table: independent of this machine. The main processing source and destination address IP and port

Linux Basic Tutorial 29-tcpdump command-1

: Flags [P.], seq 3091447763:3091447975, ack 4113666212, win 251, length 2121 packet captured6 packets received by filter0 packets dropped by kernel[[emailprotected] ~]# tcpdump -i ens5f1 -c 1 -ttcpdump: verbose output suppressed, use -v or -vv for full protocol decodelistening on ens5f1, link-type EN10MB (Ethernet), capture size 262144 bytesIP localhost.localdomain.ssh > 112.64.60.194.19101: Flags [P.], seq 3091448643:3091448855, ack 4113666488, win 251, length 2121 packet captured6 packets rec

Understand how Python executes, play with bytecode bytecode (bottom)

=" " ) 124 0 0 1 0 83 by looking up a dictionary or another more ingenious and normal way, you can find out that 124 of the opcode represent Load_fast, 100 stands for load_const.This type of opcode is followed by a two-byte parameter, 0 0 and 1 0, respectively.But some opcode have no parameters behind them, such as the one represented by the 83 return_valuePeople who do not know may feel a little strange, why return_value without parameters, without parameters how to retu

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