Work with a database: 1sqlite3 "$FILE".sqlite3 Compress the database: pragma vacuum; Optimize the database: pragma optimize;

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Basic ssh Try out basic ssh by accessing git.charm.sh, without needing authentication: 1ssh -t git.charm.sh Start an ssh server to try it out. The ssh server is sometimes in a package called openssh, and sometimes only in openssh-server. Once it's installed, check it's working: 1sudo systemctl status ssh If that …

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Install fdroid on phone. Install termux. Open fdroid, and run: 1pkg upgrade 2pkg install busybox termux-services openssh openssh-sftp-server 3source $PREFIX/etc/profile.d/start-services.sh openssh-sftp-server will mount the phone's file-system, and show you some directories in ~/storage/. Copy your PC's ssh public key …

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Requirements ssh Mount a remote filesystem locally with fuse-sshfs: 1sshfs *user*@192.168.0.10:/home/user /tmp/mnt Unmount with: 1fusermount -u /tmp/mnt Set it up on /etc/fstab with: 1sshfs#bkp@bkp.a-server.ninja:/media/store1/bkp /backup fuse defaults,allow_other,reconnect,delay_connect 0 0 Make image backup of …

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Requirements ssh Mount 1sshfs $USER@$IP_ADDRESS:$DIR Various flags: Encryption: -C Map between local and remote user UIDs: -o idmap-user Unmount 1fusermount3 -u $DIR

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Requirements DNS Record List There is nothing to stop scammers from sending email claiming to be coming from your domain. And the older it gets, the more valuable it is for spoofing. Just add these two TXT records to the DNS for your domain: Name Type Value @ TXT v=spf1 -all _dmarc TXT v=DMARC1; p=reject; The first …

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Make a hosts file with one host (your computer) and one variable, just to test: 1hosts_file=hosts 2fort="$(fortune -s | head -1)" 3cowvar=cowsays 4 5echo "[cows] 6$HOSTNAME $cowvar='${fort}'" > "${hosts_file}" Now ansible should be able to show that '${cowvar}' in a debug message: 1ansible -i "$hosts_file" -m debug -a …

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Requirements GPG Basics Setup gpg keys. Show your gpg secret it: 1gpg --list-secret-keys Then use the id number under sec to make a pass repo: 1key="$(gpg --list-secret-keys | grep -m 1 -A1 '^sec' | tail -n 1)" 1pass init $key 2cat .password-store/.gpg-id To add a basic password, e.g. for ${website}: 1pass ${website} …

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List Services All possible services are in: 1ls /etc/sv The computer only uses those in /var/service, so symbolic links are made to start and stop services. 1ls /var/service Start Services Enable the sshd service, so that ssh will work every time you boot up: 1sudo ln -s /etc/sv/sshd /var/service Then start the …

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Making a Swap File 1su root 2cd /var/cache/ 3dd if=/dev/zero of=swapfile bs=1K count=4M This creates a swapfile of (1k x 4M) 4 Gigs. Change 4M to XM for an XGig swap. 1chmod 600 swapfile 1mkswap swapfile 1swapon swapfile Test it's working with top 1top -bn1 | grep -i swap or: 1echo "/var/cache/swapfile none swap sw 0 …

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