Hi,
with virtualization it simply possible to change systems within a few mouse clicks. For example adding new disks or increasing the disk size of a hard disk without a reboot.
Continue reading Linux: Rescan for new and changes of devices
Category Archives: Linux
Stuff about Linux
Linux: Connection timed out, cannot reboot systemd based system
Hi,
sometimes it occours that a systemd based Linux cannot rebooted.
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Mail: Connect TLS encrypted to a smtp server by telnet
Hi,
the SMTP protocol is ASCII based. In the past, the SMTP protocol goes unencrypted over the wire means you can simply send emails by connecting to the SMTP port 25 and enter some SMTP commands via telnet:
michael@debdev ~ # telnet smtp.yourdomain.org 25 EHLO test.example.com MAIL FROM:info@yourdomain.org RCPT TO:receiver@receiversdomain.org DATA Subject: Testmessage <ENTER> <ENTER> This is a test message. End with <ENTER><ENTER> and point . QUIT
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Debian: Shutdown when pressing power button
Hi,
when you install Debian with just the Standard minium System utilities a power off by pressing the power button is not possible.
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Linux: HEX edit and diff in a shell
Hi,
let us assume you want to edit a binary file /tmp/binfile and you want to replace all strings matches to “sda” by “hda”.
gnu sed can edit bin files by the \xnn hex notation. The option –in-place changes the original file and makes a backup copy with a file extension .org
michael@devdeb ~# sed -e 's/\x73\x64\x61/\x68\x64\x61/g' /tmp/binfile --in-place=.org