Check These Out
you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)
host B (you) redirects a modem port (62220) to his local ssh.
host A is a remote machine (the ones that issues the ssh cmd).
once connected port 5497 is in listening mode on host B.
host B just do a
ssh 127.0.0.1 -p 5497 -l user
and reaches the remote host'ssh. This can be used also for vnc and so on.
ffprobe is specially intended to get video information
A much quicker and (not dirtier) option. use the man page for help. On linux/ubuntu you will need to `sudo apt-get -y install arp-scan`.
Perl is installed by default on most modern OS when jot is not.
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token.
This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use:
`awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'`
You must adapt the command line to include:
* $MFA_IDis ARN of the virtual MFA or serial number of the physical one
* TTL for the credentials
Converts any number of seconds into days, hours, minutes and seconds.
sec2dhms() {
declare -i SS="$1"
D=$(( SS / 86400 ))
H=$(( SS % 86400 / 3600 ))
M=$(( SS % 3600 / 60 ))
S=$(( SS % 60 ))
[ "$D" -gt 0 ] && echo -n "${D}:"
[ "$H" -gt 0 ] && printf "%02g:" "$H"
printf "%02g:%02g\n" "$M" "$S"
}
the newest rpms are at the top; individual packages can also be queried this way:
rpm --last -q package
Useful when you have multiple files or binary files that you need to transfer to a different host and scp or the like is unavailable.
To unpack on the destination host copy paste output using the opposite order:
openssl enc -d -base64 | gunzip | tar -x
Terminate openssl input using ^d
Note: gzip is outside of tar because using -z in tar produces lots of extra padding.