Alexey Bokov's weblog

• Open Source Search with Lucene & Solr
• Lucene Near Realtime Search
• LinkedIn Search & Lucene
• Distributed Scoring For Lucene Implementation
• Twitter’s New Search Architecture
• Real time search – Billions quieries per day
• Distributed lucene – Katta project
• Does iTunes use Lucene for search?
• Index Server Project Proposal
• NRS – Near Real time search with Lucene
• Solr’s distributed search
• Effective Smoothing for a Terabyte of Text
• Zoie – real time search and indexing based on Lucene
• Distrubuted lucene index on top of Cassandra : Lucandra = Lucene + Cassandra

You can use sed :

sed -e 's/\([^\d]*\)/\L\1/' in.txt > out.txt

or perl inliner :

perl -ne 'utf8::decode $_; $_ = lc $_; utf8::encode $_; print' in.txt > out.txt
.
Both guys works fine for unicode file too.

Using telnet in bash scripts to automate some stuff ? It’s really easy, here’s an example to tell “hello world” on telnet server :

req="hello world"
server="my_server 1234"
val=`( echo open ${server}
sleep 3
echo "${req}"
sleep 1 ) | telnet`
echo $val


• Ubuntu doesn’t asking for login after boot up ( may happen after unexpected shutdown ) :
  press Ctrl-Alt-F1 to login in terminal mode and use fsck to fix it
• Add user short memo :
[root@my-box ~]# useradd -g users -u 560 tuser
[root@my-box ~]# passwd tuser

  ps. sudo will be required in not-root case 🙂
• Proper access rights for .ssh files :
chmod 700 ~/.ssh
chmod 600 ~/.ssh/id_rsa
chmod 644 ~/.ssh/id_rsa.pub
chmod 644 ~/.ssh/authorized_keys
chmod 644 ~/.ssh/known_hosts

• List all files in folder sorted by size :
find . -type f -exec du -k "{}" \; | sort -n


Microsoft is offering about 20,000 lines of its own device drivers to the Linux kernel that will enable Linux to run as a guest on its Hyper-V virtualization technology. Specifically, the contributed loadable kernel modules enable Linux to run in ‘enlightened mode’, giving it efficiencies equivalent to a Windows virtual machine running on Hyper-V. Also see Redmond Releases Code to Linux Kernel Community at pcworld.com