{"id":6941,"date":"2017-02-22T09:11:24","date_gmt":"2017-02-22T09:11:24","guid":{"rendered":"https:\/\/stevepedwards.today\/DebianAdmin\/?p=6941"},"modified":"2017-02-22T09:11:24","modified_gmt":"2017-02-22T09:11:24","slug":"backing-up-working-picam-images-over-the-net-with-dd-and-netcat","status":"publish","type":"post","link":"https:\/\/stevepedwards.today\/DebianAdmin\/backing-up-working-picam-images-over-the-net-with-dd-and-netcat\/","title":{"rendered":"Backing Up Working Picam Images Over the Net With dd and Netcat"},"content":{"rendered":"
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I recently updated my Picams to the latest Raspbian firmware after a camera module change, using:<\/p>\n

sudo rpi-update<\/span><\/p>\n

Once updated and working, complete with changed passwords etc. it is inconvenient to bring these units down physically to take the card out - one is in the garage - to DD clone the micro SD card images locally, so send the image direct from the working camera instead using netcat.<\/p>\n

Get the IP of the target server:<\/p>\n

ifconfig<\/span>
\neth0 Link encap:Ethernet HWaddr 00:23:54:3a:eb:9a \u00a0inet addr:192.168.1.15<\/span><\/p>\n

Use netcat to send\u00a0the images over your net by setting up a listening server FIRST - any port number you like - on the target where the image is to be saved e.g:<\/p>\n

sudo apt install pv<\/span><\/p>\n

stevee@hppavmint ~ $ netcat -l -p 9000 | pv | dd of=pi.image<\/span><\/p>\n

Then ssh into the Pi and send the full bootable SD card image after you know the device id:<\/p>\n

stevee@pirear ~ $ sudo fdisk -l<\/span>
\n[sudo] password for stevee:<\/span><\/p>\n

Disk \/dev\/mmcblk0<\/strong>: 7948 MB, 7948206080 bytes<\/span><\/p>\n

stevee@pirear ~ $ sudo dd if=\/dev\/mmcblk0 | netcat 192.168.1.15 9000<\/span>
\n[sudo] password for stevee:<\/p>\n

Check on progress periodically in a third terminal to see the image grow:<\/p>\n

netcat -l -p 9000 | pv | dd of=piroad.img<\/span>
\n533MB 0:03:23 [3.32MB\/s]<\/span><\/p>\n

stevee@hppavmint ~ $ ll piroad.img<\/span>
\n-rw-r--r-- 1 stevee stevee 6355204096 Feb 22 09:06 pi.image<\/span><\/p>\n

When done, you see the summary on the Pi:<\/p>\n

stevee@pirear ~ $ sudo dd if=\/dev\/mmcblk0 | netcat 192.168.1.5 9000
\n[sudo] password for stevee: <\/span>
\n15523840+0 records in<\/span>
\n15523840+0 records out<\/span>
\n7948206080 bytes (7.9 GB) copied, 1009.06 s, 7.9 MB\/s<\/span><\/p>\n

It took 16 minutes.<\/p>\n

As I named the image without a \"typical\" extension - even though Linux doesn't need<\/em> one - (duh!) I'll rename it to Piroad.img so it is better recognised for future general *.img searches and in the GUI apps for creating new SD cards in future using USB Writer.<\/p>\n

mv -v pi.image piroad.img<\/span><\/p>\n

You can check it mounts locally\u00a0with Disk Image Mounter:<\/p>\n

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I recently updated my Picams to the latest Raspbian firmware after a camera module change, using: sudo rpi-update Once updated and working, complete with changed passwords etc. it is inconvenient to bring these units down physically to take the card out - one is in the garage - to DD clone the micro SD card ...\u00a0 Backing Up Working Picam Images Over the Net With dd and Netcat<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,2],"tags":[],"class_list":["post-6941","post","type-post","status-publish","format-standard","hentry","category-uncategorised","category-uncategorized"],"a3_pvc":{"activated":true,"total_views":1,"today_views":0},"_links":{"self":[{"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/posts\/6941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/comments?post=6941"}],"version-history":[{"count":0,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/posts\/6941\/revisions"}],"wp:attachment":[{"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/media?parent=6941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/categories?post=6941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stevepedwards.today\/DebianAdmin\/wp-json\/wp\/v2\/tags?post=6941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}