Elementi di amministrazione di rete da shell Linux e Windows

• !"#$%&!'(()*+#,&-#.%&/#0'1++'&

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–  7W&X&7!&R/Y&Z&

•  [>%&7!&X&5\6%5V]%^%5,&ZX644%644%644%_&XX`&7W&X&5\6%5V]%^%_&&

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•  ifconfig [interfaccia] •  ifconfig [interfaccia ...

[famiglia_indirizzamento] [indirizzo] opzioni] •  c,/"#(01S&0'191&)*+'((<;#&?1"&<:0<"1&1&@<9;191"1&'+&>'>;1@<&-1++1&

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•  g&,/"#(01-.#-234565652-–  R:0<&+S'9;1"$<88'<&c.#S&8#""'>?#9-19;1&<+&!""#$%&'(8#9&'+&9#;#&'9-'"'((#&7!&56^%_%_%5%&

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•  h&A>B,(A,/"#(01-*786-–  [@1.1&+<&>';)<('#91&-1++S'9;1"$<88'<&c*786S&8#""'>?#9-19;1&<++<&?"'@<&>8C1-<&[;C1"91;%&

•  h&A>B,(A,/"#(01-–  [@1.1&+<&>';)<('#91&-'&;).1&+1&'9;1"$<881&-'&"1;1&<:0<;1%&

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•  ipconfig [/all] [/renew [Adapter]] [/release [Adapter]] [/displaydns]

•  Z#>;"<&&'&0<+#"'&8#""19*&-'&8#9QB)"<('#91&-'&"1;1&1&"'9$"1>8<&+1&'@?#>;<('#9'&Yk9<@'8&l#>;&J#9QB)"<*#9&!"#;#8#+KYlJ!L&1&Y#@<'9&/<@1&ek>;1@KY/eL%&

•  E><;#&>19(<&?<"<@1;"',&,C"#(01&@#>;"<&'9-'"'((#&7!,&>)H91;&@<>a&1&B<;1N<k&-'&-<$<)+;&?1"&;):&B+'&<-<?;1"&

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•  D+'&1019;)<+'&?1"8#">'&>)881>>'0',&019B#9#&-1Q9'*&-<&<+;"'&1+<H#"<;#"'&91++<&"1;1%&&

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•  F1&0#8'&1+1@19;<"'&>#9#&'9>1"';1&<);#@<*8<@19;1&-<&ifconfig •  !1"&)9<&B1>*#91&?'u&8#@?+1;<,&>'&?)U&)><"1&route%&•  [>1@?'&

–  g&$#I7*-=%%-J8#>7-234565652-%*)-.#-•  R:0<&+S'9>;"<-<@19;#&01">#&+S'9;1"$<88'<&+#8<+1&!""#$%&'%&

–  g&$#I7*-=%%-J(*7-29352:;5256-(*7<=>?-3@@53@@53@@56-%*)-*786-

•  R:0<&+S'9>;"<-<@19;#&-1++<&"1;1&5\6%5V]%5%_&8C1&)*+'((<&+<&@<>8C1"<&-'&"1;1&644%644%644%_,&>?18'Q8<9-#&8C1&"'B)<"-<&+S'9;1"$<88'<&-'&"1;1&c*786S%&

–  h&$#I7*-•  Z#>;"<&+<&;<H1++<&-'&'9>;"<-<@19;#&<.)<+1%&

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&79;1>;<('#9'&-1++<&;<H1++<&-'&'9>;"<-<@19;#%&

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•  route [-f] [-p] [Command [Destination] [mask Netmask] [Gateway] [metric Metric]] [if Interface]]

•  Z#>;"<&1&@#-'Q8<&+1&'>;<9(1&-1++<&;<H1++<&-'&"#)*9B&7!&+#8<+1%&E><;#&>19(<&?<"<@1;"',&"#);1&@#>;"<&+jC1+?%&

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!'9B&•  ping [opzioni] indirizzo

–  cC,(1S&?1"@1.1&-'&'90'<"1&)9<&"'8C'1>;<&-'&18#&<&)9&'9-'"'((#,&)*+'((<9-#&'+&?"#;#8#++#&7JZ!,&01"'Q8<9-#&-'&"'8101"1&;<+1&18#&'9&@#-#&8#""1.#&XX`&'9>;"<-<@19;#&$)9('#9<9;1&&

–  cC,(1S&0'191&)><;#&=)<>'&>1@?"1&>19(<&#?('#9',&'9&@#-#&-<&#.191"1&)9<&"'8C'1>;<&-'&18#&8#9*9)#,&<&'9;1"0<++'&-'&)9&>18#9-#,&8C1&?)U&1>>1"1&'9;1""#.<&<."<01">#&+<&;<>*1"<&8#9&+<&8#@H'9<('#91&n&1)/!2&(o%&

•  [>1@?'#&–  h&C,(1-29352:;5252-

•  790'<&)9<&"'8C'1>;<&-'&18#&<++S'9-'"'((#&5\6%5V]%5%5,&<&'9;1"0<++'&"1B#+<"'&-'&)9&>18#9-#,&Q9#&<&8C1&"'8101&)9&>1B9<+1&-'&'9;1"")('#91%&

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•  ping [-t] [-a] [-n Count] [-l Size] [-i TTL] [-r Count] [{-j HostList }] [-w Timeout] [TargetName]

•  d1"'Q8<&<&+'01++#&7!&+<&8#991:0';v&8#9&)9&<+;"#&8#@?);1"&'90'<9-#&@1>><BB'&7JZ!&K79;1"91;&J#9;"#+&Z1>><B1&!"#;#8#+L&-'&3&4"(5*67*.)8(Z#>;"<&+<&"'810);<&-1'&@>B&-'&3&4"(5*#!9(8#""'>?#9-19*,&'9>'1@1&<'&"#)9-f;"'?&*@1>%&!'9B&b&'+&8#@<9-#&?"'@<"'#&)><;#&?1"&01"'Q8<"1&8#991:0';v,&"<BB')9B'H'+';v,&1&"'>#+)('#91&-1'&9#@'%&E><;#&>19(<&?<"<@1;"',&C,(1&@#>;"<&+jC1+?%&

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carpS&?1"@1.1&-'&'>?1('#9<"1&1&-'&@#-'Q8<"1&+<&;<H1++<&RW!&-1+&>'>;1@<%&

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# arp -a 192.168.1.2 Z#>;"<&+1&0#8'&"'$1"';1&1>8+)>'0<@19;1&<+&9#-#&5\6%5V]%5%6%&

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# arp -s 192.168.1.2 00:01:02:03:04:05 R>>1B9<&?1"@<919;1@19;1&K?1"&+<&-)"<;<&-1+&$)9('#9<@19;#&-1+&>'>;1@<L&+S'9-'"'((#&[;C1"91;&__T_5T_6T_PT_2T_4&<++S'9-'"'((#&7!&5\6%5V]%5%6%&

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•  arp [-a [InetAddr] [-N IfaceAddr]] [-d InetAddr [IfaceAddr]] [-s InetAddr EtherAddr [IfaceAddr]]

•  Z#>;"<&1&@#-'Q8<&+1&'>;<9(1&?"1>19*&91++<&8<8C1&RW!KR--"1>>&W1>#+)*#9&!"#;#8+L,&8C1&8#9*191&)9<&#&?'u&;<H1++1&)><;1&?1"&><+0<"1&'9-'"'(('&7!&1&"'>?%&79-'"'(('&Q8'&y&[;C1"91;&#&I#a19&W'9B&y&"'>#+*%&Jjb&)9<&;<H1++<&?1"&#B9'&<-<?;1"&[;C1"91;&#&I#a19&W'9B&&'9>;<++<;#&>)+&8#@?);1"%&&E><;#&>19(<&?<"<@1;"',&=$C&@#>;"<&+jC1+?%&

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Nota: l’errore questa volta è diverso, eth0 è configurata ma il problema questa volta è la risoluzione del nome

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Proviamo a vedere cosa succede se cancello i riferimenti dal file /etc/resolv.conf

Per modificare il file ho semplicemente invocato un editor Nell’esempio riportato nella figura: nano /etc/resolv.conf

- Cancello entrambe le righe dal file - Salvo ed esco

Cosa accadrà se provo ad eseguire il comando ‘ping www.google.it’? Perché?

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