Commands by decept

Commands by decept (3)

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find the difference in 2 files with grep (diff alternative)

-f file -v invert-match : invert the sense of matching, to select non matching lines
This is sample output - yours may be different.
-6

grep -vf file1 file2

decept · 2010-06-15 19:43:08 3
hanukkah colored bash prompt

blue and yellow colored bash prompt for a Hanukkah celebration on your box
This is sample output - yours may be different.
2

export PS1="\e[0;34m[\u\e[0;34m@\h[\e[0;33m\w\e[0m\e[0m\e[0;34m]#\e[0m "

decept · 2009-12-13 18:35:06 7
find files containing text

-l outputs only the file names -i ignores the case -r descends into subdirectories
This is sample output - yours may be different.
23

grep -lir "some text" *

decept · 2009-05-20 19:44:35 7

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encode HTML entities

Encodes HTML entities from input (file or stdin) so it's possible to directly past the result to a blog or HTML source file.

Find broken symlinks and delete them

If you don't want to delete them, but just want to list them, do $ find -L /path -type l If you want to delete them with confirmation first, do $ find -L /path -type l -exec rm -i {} + Using the -L flag follows symlinks, so the -type l test only returns true if the link can't be followed, or is a symlink to another broken symlink.

Check reverse DNS

The +short option should make dig less chatty.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

extract element of xml

poor man's xml parser :)

Use acpi and notify-send to report current temperature every five minutes.

Use acpi and notify-send to report current temperature every five minutes. Works best in a shell script run at startup. acpi is called for temperature and fed to notify-send for a tooltip. After waiting five minutes, it will start over.

Alternative size (human readable) of files and directories (biggest last)

Replace Every occurrence of a word in a file

Replace 'this' with 'that'

Want to known what time is it in another part of the world ?

available timezone can be found in /usr/share/zoneinfo. Other examples: $ TZ=Europe/Paris date; TZ=Australia/Sydney date; TZ=America/New_York date this is based on zoneinfo files on macosx. Your mileage my vary on other unix dialects

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

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