Shell: how to go to the beginning of line when you are inside a screen?
I am inside a screen (screen -Ra). I have a long command, and I am at the end. Instead of keeping the left arrow, how can you go to the beginning of the line?
Unix & Linux
How to know if /dev/sdX is a connected USB or HDD?
How can I know if /dev/sdX is a local HDD or USB key?
I’d prefer a way of doing this without root privileges.
how to properly log the output of a console program that frequently updates “parts” of the screen, resulting in a messy log file?
I have some Java executable (jar) that is run my some shell script from a cron job once every night. That executable does not print log statements “as usual” just by printing them out in a sequential manner like line after line (print after print), but while it processes its data its printing a single line with status data and then “overwrite” or “update” just that single line over and over again, until its done with this part of processing.
Recovering ext4 superblocks
Recently, my external hard drive enclosure failed (the hard drive itself powers up in another enclosure). However, as a result, it appears its EXT4 file system is corrupt.
Is it OK to change /etc/machine-id?
I cloned a disk (SSD) and put the cloned disk into another machine. Now both systems have the same value in /etc/machine-id. Is it any problem to simply edit /etc/machine-id to change the value? Can I do this while the system is running (or do I need to boot from a Live USB)?
Partition still encrypted with luks after wipefs
I wiped the disk using
How can I detect when a monitor is plugged in or unplugged?
Is there any event that is triggered when I plug in or out an external monitor into the DisplayPort of my laptop? ACPID and UDEV don’t react at all.
How to configure systemd-resolved and systemd-networkd to use local DNS server for resolving local domains and remote DNS server for remote domains?
I’m connected to local area network with access to the Internet through gateway. There is DNS server in local network which is capable of resolving hostnames of computers from local network.
What does the Broken pipe message mean in an SSH session?
Sometimes my SSH session disconnects with a Write failed: Broken pipe message. What does it mean? And how can I keep my session open?
Tool in UNIX to subtract dates
Is there any tool in Solaris UNIX (so no GNU tool available) to subtract dates? I know that in Linux we have gawk that can subtract one date from another. But in Solaris the maximum we have is nawk (improved awk) which cannot perform date calculations. Also I cannot use perl.