TIL - Today I Learned

Things I learned from colleagues, the internet or just out of curiosity.

tail -f <logfile> | grep --line-buffered: filter logfile continuously while debugging a service or some ongoing process
&<term> in less: show only lines matching filter in less pager
ctrl+x ctrl+e in bash: opens default editor (specified with $EDITOR or $VISUAL) for specifying a prompt, will get executed on save+close (src, look for edit-and-execute-command).
ctrl+r in bash: fuzzy search in bash history, press again for cycling through
ctrl+x and ctrl+a on an action while interactive rebase: cycle through the rebase actions when interactively rebasing within an editor (git rebase -i)
yes | dd oflag=/mnt/data iflag=fullblock oflag=direct bs=16M count=$((1024*1024/16)) status=progress: generate 1TB of non-random test data with storage backend speed, avoid buffering where possible
go doc --all strings: local documentation of the go strings package
du --summarize -h .: show summarized usage of a folder human friendly