Is there any way to undo a bash history modification?
By pressing up, I can go through previously entered commands. I’ve noticed though that if I modify one of them, that alters the history. For instance, if I type:
Unix & Linux
sshd failed due to network not yet available
I’m running Arch Linux. After I reboot, the sshd.service fails to start due to the network not yet being up. I have to manually run:
Linux – IPC with init
The init process exists as an ancestor of all of processes on a linux system. Does this process have any kind of IPC entry point ? Do other processes ever do IPC with init for any reason ?
Remote for-loop over SSH
I have the following in a script
Why xargs can’t work with tail -f?
I want tail -f /var/log/syslog | grep it with pattern “arpwatch” and send every line to myself via jabber: xmpp [email protected] using xargs
Is there a way to know when a systemd timer will run next?
I am testing a systemd timer and trying to override its default timeout, but without success. I’m wondering whether there is a way to ask systemd to tell us when the service is going to be run next.
Full text search for man pages
apropos works great for searching manual page names and descriptions. Is there a similar command for searching the entire contents of the manual pages?
How do I enable auto-login in Mint 18?
Mint 18.2 64b Cinnamon 3.4.3 This is running in a VM on my machine so I’m not worried about login security. I’ve been looking around on the Mint forums and only found a lot of threads about troubleshooting problems with autologin. The setting is not in the Login Window settings screen. The setting is not … Read more
What is the right way to consistently mangle bash terminal?
I’m on OSX 10.11.1 and occasionally my bash terminal gets mangled. It often happens when I accidentally cat a binary file. The result can be seen on the image below. The output becomes weird, and I can’t type ascii characters anymore.
How is the C library able to access environment variables?
How do functions like getenv(3) access the environment when my program doesn’t have any references to the environment?