zsh -fx ---start a clean version of zsh (without startup files)

bootparam: init=/bin/bash rw

/etc/inittab: s1:12345:respawn:/sbin/agetty 19200 ttyS0 vt100 ---enable login through serial console

bootparam: console=ttySo,19200n81 ---redirects boot messages to COM1

echo 'Subject: Hey, ss!' |/usr/lib/sendmail -v gaby@gmail.com

sh: b=${a/23/BB} ---assign b the value of a, where all occurances of 23 are substituted with BB

vim: CTRL-@ insert previously inserted text and stop Insert mode

vim: i_CTRL-R {0-9a-z%#:.-="} insert the contents of a register

exportfs -ar

stty -a

stty erase ^h --- ^\? for DELETE key

vim: i_CTRL-A ---insert previously inserted text; i_CTRL-@| CTRL-@ ---insert previously inserted text and stop

sh: $HISTFILE, $HISTSIZE

rsync -vaze ssh --delete /www/ $dest_ip:/www --progress --bwlimit=1 ||echo "rsync failed"| mail admin@me.com ---note slash at the end of /www/ ..

It makes it be ragarded as the target rather than subdir /www/www
bwlimit default is in KB/sec

vim: `<[ ---go to the start of the (previous) Visual area

vim: `[ --- go to the start of the previously operated or put text

vim: `quote `" ---go to the position when last editing this file

vim: `0 ---go to position where vim previously exited.

rm -- '-foo'

sh: set -o ignoreeof ; csh: set ignoreeof

hardware flow control uses dedicated signal wires such as RTS/CTS or DTR/DSR while software flow control signals by sending DC1 or DC3 control bytes..

in the normal data wires. For hardware flow control, the cable must be correctly wired.

mkisofs -r -b boot.img -c /boot/boot.catalog -o /tmp/cd.image; cdrecord -scanbus; cdrecord -v de=1,0,0 -data /tmp/cd.image ---the boot.catalog file ..

need not already exist. It is generated by mkisofs. The command linke optien just tells mkisofs where in the image to store the generated file.