public int hashCode(); public boolean equals(Object o);
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Java: what makes two keys equal in a hashmap?
You need to override two methods in key class:
List the files opened by a specific program/process
1. find the pid, i.e. process id, of the program/application. e.g. java
See Also: http://www.cyberciti.biz/faq/howto-linux-get-list-of-open-files/
ps aux | grep java2. use lsof to list the files opened by that process (where 13317 is the pid, e.g.).
lsof -p 13317
See Also: http://www.cyberciti.biz/faq/howto-linux-get-list-of-open-files/
Picasa for Linux could not start
- Dowload: http://picasa.google.com/linux/
- Install: sudo dpkg -i picasa_2.7.3736-15_i386.deb
- Could not start?
/usr/bin/picasa: line 139: 6750 Segmentation fault "$PIC_BINDIR"/wrapper check_dir.exe.so /usr/bin/picasa: line 175: 6845 Segmentation fault "$PIC_BINDIR/wrapper" regedit /E $registry_export HKEY_USERS\\S-1-5-4\\Software\\Google\\Picasa\\Picasa2\\Preferences\\
Fix: sudo sysctl -w vm.mmap_min_addr=0; rm -fr ~/.picasa
Merge PDF files into one
gs -q -sPAPERSIZE=letter -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=out.pdf in1.pdf in2.pdf in3.pdf
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