$ read -s -p"Password: " USER_PASSWORD_VARIABLE; echo
You can ask repeatedly for a non-blank password using this function:
function read_password() {
while [ ! -n "$USER_PASSWORD" ]; do
read -s -p”Password: ” USER_PASSWORD
…
$ ssh -C USER@HOST tar -c –exclude /proc –exclude /sys / | tar -x
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by David Winterbottom (codeinthehole.com)
$ gpg –gen-random –armor 1 30
According to the gpg(1) manual:
–gen-random 0|1|2 count
Emit count random bytes of the given quality level 0, 1 or 2. If count is not given or zero, an endless sequence of random bytes will be emitted. If u…
$ screen -x <screen_id>
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by David Winterbottom (codeinthehole.com)
$ qrencode -o myqr.png ‘MECARD:N:Lee,Chris;TEL:8881234567;EMAIL:chris.lee@somedomain.com;;’
Add the QR code image on your webpage, business card ., etc, so people can scan it and quick add to their Contact Address Book. Tested on iPhone with QRreader.
…
$ gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=output.pdf input1.pdf input2.pdf …
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by David Winterbottom (codeinthehole.com)
$ ln -nsf <TARGET> <LINK>
Instead of deleting an existing symlink and then re-creating it pointing at the new location, it is possible to perform the same action with this one command.
Interesting discussion on whether this is possible to d…
$ ssh -f -L3389:<RDP_HOST>:3389 <SSH_PROXY> "sleep 10" && rdesktop -T’<WINDOW_TITLE>’ -uAdministrator -g800x600 -a8 -rsound:off -rclipboard:PRIMARYCLIPBOARD -5 localhost
This command will:
1. open an SSH tunnel to
2…
$ ssh remotehost ‘dpkg –get-selections’ | dpkg –set-selections && dselect install
(also works on Ubuntu) Copies the ‘install,’ ‘hold,’ ‘deinstall’ and ‘purge’ states of packages on the remote machine to be matched on the local machine. Note:…
$ alias screensaver=’for ((;;)); do echo -ne "33[$((1+RANDOM%LINES));$((1+RANDOM%COLUMNS))H33[$((RANDOM%2));3$((RANDOM%8))m$((RANDOM%10))"; sleep 0.1 ; done’
Console screensaver.
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