Commands by bendavis78

Commands by bendavis78 (2)

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Get list of servers with a specific port open

Change the -p argument for the port number. See "man nmap" for different ways to specify address ranges. Show Sample Output
This is sample output - yours may be different.
```
Host: 192.168.1.138 ()	Ports: 80/open/tcp//http///
Host: 192.168.1.139 ()	Ports: 80/open/tcp//http///
Host: 192.168.1.142 ()	Ports: 80/open/tcp//http///
```
19

nmap -sT -p 80 -oG - 192.168.1.* | grep open

bendavis78 · 2009-02-11 17:47:27 24
Add your public SSH key to a server in one command

Just run the command, type your password, and that's the last time you need to enter your password for that server. This assumes that the server supports publickey authentication. Also, the permissions on your home dir are 755, and the permissions on your .ssh dir are 700 (local and remote).
This is sample output - yours may be different.
14

cat .ssh/id_rsa.pub | ssh hostname 'cat >> .ssh/authorized_keys'

bendavis78 · 2009-02-11 17:40:12 25

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Convert seconds to [DD:][HH:]MM:SS

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" }

Change prompt to MS-DOS one (joke)

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

backup and synchronize entire remote folder locally (curlftpfs and rsync over FTP using FUSE FS)

connect to a remote server using ftp protocol over FUSE file system, then rsync the remote folder to a local one and then unmount the remote ftp server (FUSE FS) it can be divided to 3 different commands and you should have curlftpfs and rsync installed

Salvage a borked terminal

If you bork your terminal by sending binary data to STDOUT or similar, you can get your terminal back using this command rather than killing and restarting the session. Note that you often won't be able to see the characters as you type them.

Produce a pseudo random password with given length in base 64

Remove comments and empty lines from a conf file

Some conf file are very long (squid.conf) This command help to read it.

Output a SSL certificate start or end date

A quick and simple way of outputting the start and end date of a certificate, you can simply use 'openssl x509 -in xxxxxx.crt -noout -enddate' to output the end date (ex. notAfter=Feb 01 11:30:32 2009 GMT) and with the date command you format the output to an ISO format. For the start date use the switch -startdate and for end date use -enddate.

create ICO file with more than one image

requires imagemagick. -background transparent is of course optional.

draw matrix using dot

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