tar xvfj FileZilla_3.9.0.3_i586-linux-gnu.tar.bz2
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sudo chmod 775 'your directory'
if you want to know why only 775 here's your answer
400 read by owner
040 read by group
004 read by anybody
200 write by owner
020 write by group
002 write by anybody
100 execute by owner
010 execute by group
001 execute by anybody400
+040
+004
+200
+020
+100
+010
+001
=775
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sudo apt-get install worker
Then run worker from command prompt. Then in Launcher right click worker and choose Lock to Launcher
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lsb_release -a
To get the OS version from the terminal prompt.
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