Commands by sesom42

Commands by sesom42 (9)

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Generate binary sequence data
This is sample output - yours may be different.
1

printf "%x\n" $(seq 0 255) | xargs -n1 -IH echo -ne \\xH > test.dat

sesom42 · 2017-04-19 21:55:42 46
Printout a list of field numbers (awk index) from a CSV file with headers as first line.

-F, use , as field separator gsub() deletes all spaces for(){} loops over all input fields and print their index and value exit exit after first line Show Sample Output
This is sample output - yours may be different.
```
$ cat file.csv
foo, bar,baz
1,2,3
4,5,6

$ awk -F, '{gsub(/ /,"");for(f=1;f<=NF;f++) print f,$f;exit}' file.csv
1 foo
2 bar
3 baz
```
-2

awk -F, '{gsub(/ /,"");for(f=1;f<=NF;f++) print f,$f;exit}' file.csv

sesom42 · 2015-08-26 09:30:43 11
Print all open regular files sorted by the number of file handles open to each.
This is sample output - yours may be different.
0

lsof -a -d 1-99 -Fn / | grep ^n | cut -b2- | sort | uniq -c | sort -n

sesom42 · 2015-08-18 16:55:49 9
Sort Apache access.log by date and time

Sort Apache access logs by date and time using sort key field feature
This is sample output - yours may be different.
0

sort -s -b -t' ' -k 4.9,4.12n -k 4.5,4.7M -k 4.2,4.3n -k 4.14,4.15n -k 4.17,4.18n -k 4.20,4.21n access.log*

sesom42 · 2015-07-16 00:22:03 11
Randomly succeeding command

Command will succeed n% of the time. ran 75 will cause command to succeed 75% of the time. No argument will cause it to succeed 50% of the time. Show Sample Output
This is sample output - yours may be different.
```
# verify randomness
$ t=0; for i in {1..1000000}; do ran 100 && t=$((t+1));done; echo $t
1000000
$ t=0; for i in {1..1000000}; do ran 20 && t=$((t+1));done; echo $t
200174
$ t=0; for i in {1..1000000}; do ran 0 && t=$((t+1));done; echo $t
0


# usage:
$ ran 20 && echo 20% hit
```
0

ran() { [ $((RANDOM%100)) -lt ${1:-50} ]; }

sesom42 · 2015-07-16 00:06:25 9
Show drive names next to their full serial number (and disk info)
This is sample output - yours may be different.
5

find /dev/disk/by-id -type l -printf "%l\t%f\n" | cut -b7- | sort

sesom42 · 2015-05-18 17:20:39 17
drop first column of output by piping to this
This is sample output - yours may be different.
6

tr -s ' ' | cut -d' ' -f2-

sesom42 · 2015-05-08 12:47:09 10
Print whois info about connected ip addresses
This is sample output - yours may be different.
0

netstat -np --inet|awk '/firefox/{split($5,a,":");z[a[1]]++} END{for(i in z){system("whois " i)}}'|less

sesom42 · 2013-12-17 08:58:35 13
Chrome sucks
This is sample output - yours may be different.
0

ps -o rss= -C Chrome | (x=0; while read rss; do ((x+=$rss)); done; echo $((x/1024)))

sesom42 · 2013-05-08 07:22:03 6

What's this?

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

Based on capsule8 agent examples, not rigorously tested

Join lines

It's works only when you replace '\n' to ONE character.

Encode/Decode text to/from Base64 on a Mac w/out Mac Ports

I have a mac, and do not want to install mac ports to get the base64 binary. Using openssl will do the trick just fine. Note, to decode base64, specify a '-d' after 'base64' in the command. Note also the files base64.decoded.txt and base64.encoded.txt are text files.

Read all the S.M.A.R.T. data from a hard disk drive

This is to pull all the saved S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) information from a hard drive. This can give you an idea of the nature and extent of an issue on a failing hard drive.

Fire CMD every time FILE (or directory) is updated (on *BSD)

Rename files in batch

Nicely display mem usage with ps

Nicely display mem usage with ps.

Extract IPv4 addressess from file

Find usb device in realtime

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

Show word-by-word differences between two latex files, in color

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