#shelltricks — Public Fediverse posts

@cR0w I especially like how ^old_string^new_string^ can be abbreviated to just ^old_string when you want to delete the string instead of replacing it.

For example, when I've modified nftables rules, I run this to check the ruleset:

nft -c -f /etc/sysconfig/nftables.conf

and then to apply the changes, I can enter just this:

^-c

to run the same command again but without the -c option - i.e. this:

nft -f /etc/sysconfig/nftables.conf

#ShellTricks

@cR0w I especially like how ^old_string^new_string^ can be abbreviated to just ^old_string when you want to delete the string instead of replacing it.

For example, when I've modified nftables rules, I run this to check the ruleset:

nft -c -f /etc/sysconfig/nftables.conf

and then to apply the changes, I can enter just this:

^-c

to run the same command again but without the -c option - i.e. this:

nft -f /etc/sysconfig/nftables.conf

#ShellTricks

@pa @darthnull @bruce @bob_zim @cR0w Might be worth noting it should be ctrl-r

ctrl-R (capitalized) will go one entry "closer" to the current time, while ctrl-r will cycle back through all matching commands in reverse chronological order

Great if you realize a second too late "Oh shit, I needed that"

#shelltricks

@pa @darthnull @bruce @bob_zim @cR0w Might be worth noting it should be ctrl-r

ctrl-R (capitalized) will go one entry "closer" to the current time, while ctrl-r will cycle back through all matching commands in reverse chronological order

Great if you realize a second too late "Oh shit, I needed that"

#shelltricks

@darthnull @bob_zim @cR0w

This subject needs a hastag. #ShellTricks

@darthnull @bob_zim @cR0w

This subject needs a hastag. #ShellTricks

#shellTricks #linux

https://www.youtube.com/watch?v=2A4bs40scSo

#shellTricks #linux

https://www.youtube.com/watch?v=2A4bs40scSo

Shell Tricks That Make Life Easier (and Save Your Sanity)

https://blog.hofstede.it/shell-tricks-that-actually-make-life-easier-and-save-your-sanity/

#HackerNews #ShellTricks #LifeHacks #Productivity #TechTips #SanitySaver

Shell Tricks That Make Life Easier (and Save Your Sanity)

https://blog.hofstede.it/shell-tricks-that-actually-make-life-easier-and-save-your-sanity/

#HackerNews #ShellTricks #LifeHacks #Productivity #TechTips #SanitySaver

redteamers take note, if your c2 can't handle moving whole directories very well.

usually works like a champ in places where they don't look at the network stack much or at all, or employs folks who openly say networking doesnt matter

#BashTricks #ShellTricks #ssh #postgresql

redteamers take note, if your c2 can't handle moving whole directories very well.

usually works like a champ in places where they don't look at the network stack much or at all, or employs folks who openly say networking doesnt matter

#BashTricks #ShellTricks #ssh #postgresql

Want to read in a password from stdin during a demo without exposing it? This is what I used in my latest talk: `stty -echo && read PASSWORD && stty echo`. #ShellTricks

Want to read in a password from stdin during a demo without exposing it? This is what I used in my latest talk: `stty -echo && read PASSWORD && stty echo`. #ShellTricks

Capture STDOUT, STDERR and return status in shell variables

This second answer ( the one with the banana function ) shows how to capture all three to variables in bash without needing tmp files

https://stackoverflow.com/questions/13806626/capture-both-stdout-and-stderr-in-bash

----
banana() {
echo "banana to stdout"
echo >&2 "banana to stderr"
return 42
}
----

----
. <({ berr=$({ bout=$(banana); bret=$?; } 2>&1; declare -p bout bret >&2); declare -p berr; } 2>&1)
----

Then check values of $bout, $berr, $bret

#ShellTricks #bash #FLOX