vimb config/dark style (based on https://fanglingsu.github.io/vimb/howto.html)
#!/bin/sh -e# Creates full pgsql backup with symlinks to last and prev backup.BACKUPDIR=/home/pgsql/backupN=pg_dumpall-`date +%F`.bz2F=$BACKUPDIR/$Npg_dumpall | bzip2 > $F.tmpmv $F.tmp $Fcd $BACKUPDIR[ -L last ] && mv last prevln -sf $N last