Apple ha rilasciato un tool per la creazione di una disco USB avviabile per ripristinare i Mac che non si avviano più.
Il tool lo si può scaricare da qui http://support.apple.com/kb/DL1433
System Requirements
A Mac running OS X Lion with an existing Recovery HD
An external USB hard drive or thumb drive with at least 1GB of free space
A partire da Vista non è più possibile modificare direttamente il menu “Invia a” contestuale (il “Send To”, per gli anglofoni) poiché le directory in questione del profilo utente sono protette dal sistema operativo.
E’ possibile arrivarci, però, digitando nella barra degli indirizzi la variabile %APPDATA% e premendo invio: la directory in questione si trova poi sotto “Microsoft”, “Windows”, “SendTo”.
%APPDATA%MicrosoftWindowsSendTo
http://support.apple.com/kb/HT1629
defaults write com.apple.desktopservices DSDontWriteNetworkStores true
Dovrebbe essere una impostazione di default, non sopporto di vedere quei file in ogni directory delle mie macchine Windows / SMB
http://www.macworld.com/article/161357/2011/07/how_to_make_lion_more_like_snow_leopard.html
Go to the Universal Access preferences, click on Mouse & Trackpad, then Trackpad Options. In the Scrolling menu, choose Without Inertia.
http://www.mikesel.info/disable-spotlight/
Per evitare che mdworker consumi troppa CPU, in genere disabilito spotlight (non lo uso)
https://threatpost.com/en_us/blogs/report-iran-resorts-rip-and-replace-kill-stuxnet-072211
“The report from the Web site DEBKA file cites “intelligence sources” in claiming that Stuxnet was not purged from Iran’s nuclear sites and that the country was never able to return its uranium enrichment operation to “normal operation.” Instead, the country has said in recent days that it is installing newer and faster centrifuges at its nuclear plants and intends to speed up the uranium enrichment process, according to the country’s foreign ministry.“
Staremo a vedere se (quando…) verrà fatto uscire un worm Stuxnet 2.0 per sabotare le nuove centrifughe, o se verranno usati metodi alternativi.
http://hints.macworld.com/article.php?story=20110717190509986
Si può usare questo metodo per creare una chiavetta USB bootabile per reinstallare Lion da zero
http://support.apple.com/kb/TS3926
E’ capitato anche a me, avevo installato Ubuntu 11.04 ed infatti sul disco era presente la partizione EFI : anche rimuovendo le partizioni con gparted, reimpostando la partition table GUID e ridimensionando la partizione HFS+ non ne sono riuscito ad uscire, e così ho approfittato per reinstallare tutto da zero via chiavetta USB 😉
Vi segnalo un buon post
http://www.standalone-sysadmin.com/blog/2011/06/back-to-basics-subnetting/
tratto da http://isc.sans.edu/diary.html?storyid=10615
…If rogue APs are plugged into your network, they will decrease the TTL value in all packets by one that traverse through the access point. This can make it easy to detect the presence of those by using p0f/tcpdump/snort to look for packets that have TTL values that are lower than expected. This also works for unauthorized routers, virtual images, bad network stack configurations, etc. It won’t detect APs that aren’t plugged into your network and has some gaps (for instance, a savvy individual could modify the TTL they use before sending packets out), but again it is a “dirty” method of detection. The advantage of looking for bad “TTLs” is that you will also have advance detection of network problems as well.
You can profile your network and find legitimate TTL values by running tcpdump -v and verifying the information with a network diagram (each router, NAT device, etc will lower TTL by 1).