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 0
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 1
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 3
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 0
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 1
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 1

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Remove all but one specific file

open a seperate konsole tab and ssh to each of N servers (konsole 4.2+)

creates a new tab for each of N servers in listofservers.txt and ssh's to said servers then, try the "send to all sessions" feature of konsole to do the same work on all servers at the same time. BIG time saver, but be careful!

display typedefs, structs, unions and functions provided by a header file

will display typedefs, structs, unions and functions declared in 'stdio.h'(checkout _IO_FILE structure). It will be helpful if we want to know what a particular header file will offer to us. Command 'cpp' is GNU's C Preprocessor.

find out which directories in /home have the most files currently open

Kill all processes that don't belong to root/force logoff

explanation: grep -- displays process ids -v -- negates the matching, displays all but what is specified in the other options -u -- specifies the user to display, or in this case negate The process loops through all PIDs that are found by pgrep, then orders a forced kill to the processes in numerical order, effectively killing the parent processes first including the shells in use which will force the users to logout. Tested on Slackware Linux 12.2 and Slackware-current

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"

Find all videos under current directory using MIME a.k.a not using extension

Videos are found using their MIME type. Thus no need to for an extension for the video file. This is a efficent version of "jnash" cmd (4086). Thanks for jnash. This cmd will only show video files while his cmd show files having "video" anywhere in path.

Avoiding history file to be overwritten

If histappend options is set in bash, the file .bash_history will not be overwrite and history list is append to it.

Display usb power mode on all devices

check open ports without netstat or lsof

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