Commands by xsawyerx

Commands by xsawyerx (6)

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Get all IPs via ifconfig

Fetches the IPs and ONLY the IPs from ifconfig. Simplest, shortest, cleanest. Perl is too good to be true... (P.S.: credit should go to Peteris Krumins at catonmat.net) Show Sample Output
This is sample output - yours may be different.
```
10.200.10.147
127.0.0.1
```
11

ifconfig | perl -nle'/dr:(\S+)/ && print $1'

xsawyerx · 2009-07-23 09:33:31 8
creates a bash function to remove certain lines from SSH known_hosts file

sometimes you got conflicts using SSH (host changing ip, ip now belongs to a different machine) and you need to edit the file and remove the offending line from known_hosts. this does it much easier. Show Sample Output
This is sample output - yours may be different.
```
$ sshdel 30
< removes 30th line from the known_hosts file in ~/.ssh >
```
0

function sshdel { perl -i -n -e "print unless (\$. == $1)" ~/.ssh/known_hosts; }

xsawyerx · 2009-02-03 16:20:50 47
scping files with streamlines compression (tar gzip)

it compresses the files and folders to stdout, secure copies it to the server's stdin and runs tar there to extract the input and output to whatever destination using -C. if you emit "-C /destination", it will extract it to the home folder of the user, much like `scp file user@server:`. the "v" in the tar command can be removed for no verbosity.
This is sample output - yours may be different.
15

tar czv file1 file2 folder1 | ssh user@server tar zxv -C /destination

xsawyerx · 2009-01-29 10:38:26 62
add all files not under version control to repository

checks which files are not under version control, fetches the names and runs them through "svn add". WARNING: doesn't work with white spaces.
This is sample output - yours may be different.
13

svn status |grep '\?' |awk '{print $2}'| xargs svn add

xsawyerx · 2009-01-29 10:33:22 76
infile search and replace on N files (including backup of the files)

the addition of ".bk" to the regular "pie" idiom makes perl create a backup of every file with the extension ".bk", in case it b0rks something and you want it back
This is sample output - yours may be different.
10

perl -pi.bk -e's/foo/bar/g' file1 file2 fileN

xsawyerx · 2009-01-29 09:51:11 87
infile search and replace on N files

The "g" at the end is for global, meaning replace all occurrences and not just the first one.
This is sample output - yours may be different.
0

perl -pi -e's/foo/bar/g' file1 file2 fileN

xsawyerx · 2009-01-29 09:47:01 56

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Restore user,group and mod of an entire website

I often use it at my work, on an ovh server with root ssh access and often have to change mod after having finished an operation. This command, replace the user, group and mod by the one required by apache to work.

convert .bin / .cue into .iso image

bchunk [-v] [-p] [-r] [-w] [-s]

List all symbolic links in current directory

For those who don't have the symlinks command, you can use readlink. This command is not straightforward because readlink is very picky. The backslash in front of 'ls' means not to use an alias (e.g. color escape codes from an aliased 'ls' could mess up readlink), and the -1 (one) means to print the entries separated by newlines. xargs -l (the letter L) means to process each input separated by newlines as separate commands.

Install pip with Proxy

Installs pip packages defining a proxy

Test network speed without wasting disk

The above command will send 4GB of data from one host to the next over the network, without consuming any unnecessary disk on either the client nor the host. This is a quick and dirty way to benchmark network speed without wasting any time or disk space. Of course, change the byte size and count as necessary. This command also doesn't rely on any extra 3rd party utilities, as dd, ssh, cat, /dev/zero and /dev/null are installed on all major Unix-like operating systems.

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

Get all IPs via ifconfig

and, a lot uglier, with sed: $ ifconfig | sed -n '/inet addr:/s/[^:]\+:$\S\+$.*/\1/p' Edit: Wanted to be shorter than the perl version. Still think that the perl version is the best..

a fast way to repeat output a byte

I'm both a one-liner fan and a haskell learner

Show simple disk IO table using snmp

Show a simple table with disk IO for the specified host. you monitor a LOT of different thing. Mostly used for MRTG and similar, but this is nice for a quick look, which disk is busy. "public" is your SNMP community ensure that snmpd is running on the host which you intend to monitor

Show a passive popup in KDE

Display a passive popup during seconds. Additionnaly, --title can be used to set the title of the popup. This is a nice way to communicate with a desktop user of a machine you have an SSH access on : DISPLAY=:0 sudo -u $user -H kdialog --passivepopup "Hello you" 10 --title "cli IM"

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