Installing Java on Linux article
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	new file:   installing-java-on-linux.md
Updated installing-java-on-linux (markdown)
Added tOC
Removed temp file
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	deleted:    .installing-java-on-linux.md.swp
Finished the Installing Java on Linux article
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	modified:   installing-java-on-linux.md
Added placeholder for Linux File Permissions article
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	new file:   linux-file-permissions.md
Changed location of Linux File Permissions doc
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	renamed:    tips/linux-file-permissions.md -> concepts/linux-file-permissions.md
Updated linux-file-permissions (markdown)
Updated linux-file-permissions (markdown)
Updated linux-file-permissions (markdown)
Updated linux-file-permissions (markdown)
Modified find command doc and added grep command doc
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	modified:   find-command.md
	new file:   grep-command.md
Updated find-command (markdown)
Updated grep-command (markdown)
Added rsync command and ssh-key-passwordless login articles
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	new file:   linux/commands/rsync-command.md
	new file:   linux/tips/images/ssh-example.png
	new file:   linux/tips/ssh-key-passwordless-login.md