You can use youtube-dl to download individual videos, or you can ask it to download an entire playlist. When it’s downloading a playlist, it downloads the individual videos one-by-one, which isn’t particularly fast. Here’s a shell snippet that downloads playlist videos in parallel, which is faster: 1youtube-dl --get-id …

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A while back I had to configure a bunch of servers with Mellanox Connect-X 4 NIC's to talk to an ethernet Switch(Dell S6000-ON to be exact) and the NIC's that my customer had fitted not only had really old firmware but they were also in Infiniband(I think) mode, not Ethernet. So i had to do some legwork.. First job was …

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In the wise words of one of my collegues If you need a cheap http server 1python3 -m http.server

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Lets create a VLAN sub interface on a physical interface eth0 then add this new vlan subinterface eth0.10 to a new bridge br10 We might want to do this so that VM's running on this host have access to this VLAN 1ip link add link eth0 name eth0.10 type vlan id 10 2ip link set dev eth0.10 up 3brctl addbr br10 4brctl …

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Sometimes I need to move files from a server on which I have SSH access but these files are big and or have complex formatting which breaks if you just try and copy\paste the contents So, if we gzip the file then base64 encode this compressed file we now have a string thats much smaller than the original and it's in a …

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1echo "LS_COLORS=$LS_COLORS:'di=0;35:' ; export LS_COLORS" >> ~/.bashrc To fix the dir colour in the bash prompt, not just the LS output, set this in .bashrc: 1if [ "$color_prompt" = yes ]; then …

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1echo "LS_COLORS=$LS_COLORS:'di=0;35:' ; export LS_COLORS" >> ~/.bashrc To fix the dir colour in the bash prompt, not just the LS output, set this in .bashrc: 1if [ "$color_prompt" = yes ]; then …

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After a reboot of my Ceph test VM's a few OSD's didnt come online. When running ceph osd tree I saw: 1[root@lib-cephosd1 ~]# ceph osd tree 2ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY 3-1 0.29984 root default 4-2 0.09995 host lib-cephosd1 51 0.00999 osd.1 up 1.00000 1.00000 60 0.00999 osd.0 up 1.00000 1.00000 …

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HP Bl460C G6 Centos7 RAID tool Works on my HP G6 servers with this in lspci 0c:00.0 RAID bus controller: Hewlett-Packard Company Smart Array G6 controllers (rev 01) wget http://mirror.nforce.com/pub/software/raidtools/hpacucli-tool/hpacucli-9.40-12.0.x86_64.rpm yum install hpacucli-9.40-12.0.x86_64.rpm hpacucli ctrl …

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Original Article - http://christiank.org/wp/2010/12/pipe-a-gzipped-mysql-dump-over-ssh/ If you want to take a SQL dump from some host, compress it and send it across SSH to another host then this is the command you are chasing mysqldump -u MYSQL_USERNAME -p YOUR_DATABASE | gzip -c | ssh USERNAME@YOUR_TO_HOST 'cat > …

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