If you have graph-easy (often in the package perl-graph-easy or similar), you can make a graph from the makefile with make2graph (the package is often called makefile2graph). Start with the command to 'make all targets' (-B), and 'do a dummy run' (-n) with debug into (-d): 1make -Bnd 2make -Bnd | make2graph 3make -Bnd …

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Using the basic example, you can make a complete backup of all backup files. This file will depend upon everything inside the $(storage_directory). Unlike bash, you can't just say storage_directory/: the pattern must be stated as a 'wildcard'. 1$(storage_directory)/backup.tgz: $(wildcard $(storage_directory)/.md) 2 …

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The make system wants to know: What file you want to make, Which other files it depends on, and How to build the file. Start with a basic test-area. 1mkdir make_test ; cd $_ 2printf "%s:\n" README.md > Makefile 3printf "\t%s\n" 'echo "Basic makefile example." > $@' >> Makefile 4make NB: Always tell make how to build …

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Basics A service can consist of two files - the .sh script to run, and the .service file which describes its run conditions. The .service file goes in /etc/systemd/system. The scripts themselves might be best placed in $HOME/.local/bin. Example - tracker.service 1[Unit] 2Description=Tracker 3 4[Service] 5Type=simple …

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Check which groups you are in, and which are available: 1cat /etc/group 2groups 3cat /etc/group | grep $USER Remove yourself from all groups, and add yourself back to only wheel, audio, and your own group: 1sudo usermod --groups wheel,audio,$USER Add yourself to the wheel group: 1su root -c "usermod --append --groups …

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Find the path to a domain: 1domain=bad.horse 2max_hops=50 3 4tracepath -m $maximum_hops $domain If you're on Debian, you can use graph-easy and dothost to make an instant diagram: 1domain=dice.camp 2dothost $domain | graph-easy --boxart

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Turn a markdown file into a pdf: 1lowdown -stms "$FILE".md | pdfroff -itk -mspdf > "$FILE".pdf Example: put this Makefile in a directory, rename it Makefile, then do: 1make example 2make To give the document a title, put that title in the metadata: 1sed -i "1 i---" "$FILE".md 2sed -i "1 ititle: $TITLE" "$FILE".md 3sed …

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RAID5 You will need 4 disks and the mdadm package. The total size will be equal to the disks x 3, because one will be used for redundancy. 1sudo mdadm --create --verbose /dev/md127 --level=5 --raid-devices=4 /dev/sdb /dev/sdc /dev/sdd /dev/sde Note the variable parts: The name of the device could be /dev/md12 or …

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See screen size 1xrandr -q Automatically configure: 1xrandr --auto

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Print the average CPU load over 1 minute, 5 minutes, and 15 minutes: 1watch -d cat /proc/loadavg 2stress="$(cat /proc/loadavg | awk '{print "Usage:" $2"%"}')" Show memory usage in Gibitytes. 1free -g Show low and high gigibtye usage on a line, and repeat the measurement every 5 seconds: 1REP=5 2free --lohi -g -s $REP | …

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