Commands by Sepero

Commands by Sepero (6)

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Echo the contents of a Url

Directly send the content of a url to standard out. This command is most convenient for sending the output of a download directly to another command. Show Sample Output
This is sample output - yours may be different.
```
# Get your ip address. 
~$ echourl http://ipecho.net/plain
87.187.44.62

# Get all the email addresses on a page.
~$ echourl "http://www.example.com/contact.html" | grep -oP "\S*@\S*"
johnjones@example.com

# Download and extract a file, without saving it.
~$ echourl "http://www.example.com/tarball.gz" | tar -xz
```
1

alias echourl="wget -qO -"

Sepero · 2014-06-14 00:23:07 6
Btrfs: Find file names with checksum errors

Btrfs reports the inode numbers of files with failed checksums. Use `find` to lookup the file names of those inodes. The files may need to be deleted and replaced with backups.
This is sample output - yours may be different.
1

dmesg | grep -Po 'csum failed ino\S* \d+' | awk '{print $4}' | sort -u | xargs -n 1 find / -inum 2> /dev/null

Sepero · 2014-03-22 12:22:46 9
Btrfs: Find file names with checksum errors

Btrfs reports the inode numbers of files with failed checksums. Use `find` to lookup the file names of those inodes.
This is sample output - yours may be different.
-1

dmesg | grep -Po 'csum failed ino\S* \d+' | sort | uniq | xargs -n 3 find / -inum 2> /dev/null

Sepero · 2014-03-20 06:27:15 10
Create a tar archive using xz compression

Compress files or a directory to xz format. XZ has superior and faster compression than bzip2 in most cases. XZ is superior to 7zip format because it can save file permissions and other metadata data.
This is sample output - yours may be different.
1

tar -cJf myarchive.tar.xz /path/to/archive/

Sepero · 2014-03-13 03:34:18 6
A trash function for bash

apt-get install trash-cli Commandline program that allows you put folders or files in the standard KDE/Unity desktop trash.
This is sample output - yours may be different.
1

trash-put junkfolder

Sepero · 2014-03-09 00:24:09 9
Immediately put execute permission on any file saved/created in $HOME/bin
This is sample output - yours may be different.
1

inotifywait -mr -e CREATE $HOME/bin/ | while read i; do chmod +x "$(echo "$i" | sed 's/ \S* //')"; done

Sepero · 2014-03-08 19:21:53 6

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ping MAC ADDRESS

# first install arp-scan if not have it arp-scan 10.1.1.0/24 .... show ip+mac in localnet awk '/00:1b:11:dc:a9:65/ {print $1}' .... get ip associated with MAC ` backtick make do command substitution passing ip to command ping

On screen display of a command.

This is very useful if you need to show someone some text from a distance. (Like someone standing over your shoulder...) I'd recommend aliasing it to something like: alias osd_cat="osd_cat -o 400 -s 8 -c blue -d 60 -f -*-bitstream\ vera\ sans-*-*-*--200-*-*-*-*-*-*-*" xosd is the utility that provides osd_cat.

find sparse files

Prints the path/filename and sparseness of any sparse files (files that use less actual space than their total size because the filesystem treats large blocks of 00 bytes efficiently).

Click on a GUI window and show its process ID and command used to run the process

This command is useful when you want to know what process is responsible for a certain GUI application and what command you need to issue to launch it in terminal.

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"

Remove several files with ease

Rather than typing out all 10 files, you can use brace expansion to do the trick for you. This is useful for backup files, numbered files, or any files with a repeating pattern. Gives more control than 'rm file*' as I might want to keep others around.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

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

easily strace all your apache *child* processes

Like the original version except it does not include the parent apache process or the grep process and adds "sudo" so it can be run by user.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Use Linux coding style in C program

put "-linux" option into $HOME/.indent.pro to make it default

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