Commands by totti

Commands by totti (87)

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Identify files uniquly in a FS with inode numer
This is sample output - yours may be different.
-2

ls -i1 filename

totti · 2011-09-15 19:42:40 1
Watch end of files real time, especially log files

Changes are displayed when they are written to the file to exit Show Sample Output
This is sample output - yours may be different.
```
$ tail -f /home/ubuntu/.bash_history 
uptime 
echo hello
exit
```
-1

tail -f ~/.bash_history

totti · 2011-09-15 19:35:09 0
Go to the Nth line of file [text editor]

This is not printing, real editing using the text editor.
This is sample output - yours may be different.
1

vi +4 /etc/mtab

totti · 2011-09-15 19:18:00 2
Print all lines from a file that has the same N th and M th column
This is sample output - yours may be different.
0

awk '$3==$4' /etc/passwd

totti · 2011-09-15 19:13:18 0
Convert windows text file to linux text document
This is sample output - yours may be different.
-1

sed 's/.$//' Win-file.txt

totti · 2011-09-15 19:07:51 1
close stderr
This is sample output - yours may be different.
-3

cat aaaaaa 2>&-

totti · 2011-09-14 20:55:26 0
Number file
This is sample output - yours may be different.
2

nl file.txt > file_numbered.txt

totti · 2011-09-14 20:10:49 1
Substrings a variable

substrings a variable starting at position. If no offset given prints rest of the line Show Sample Output
This is sample output - yours may be different.
```
~$ var='123456789'; echo ${var:4}
56789

~$ var='123456789'; echo ${var:4:2}
56
```
12

var='123456789'; echo ${var:<start_pos>:<offset>}

totti · 2011-09-14 20:05:17 2
Substitute an already running command

eg: Already running cmd sleep 120 Substitution cmd c=$(pgrep sleep) && sleep 5 && kill $c
This is sample output - yours may be different.
1

c=$(pgrep <cmd>) && <new_cmd> && kill $c

totti · 2011-09-14 19:58:30 0
Binary difference of two files

Upload/download newer version of any file with less size and high speed. To remake the new file use bspatch <oldfile> <newfile> <patchfile>
This is sample output - yours may be different.
7

bsdiff <oldfile> <newfile> <patchfile>

totti · 2011-09-13 18:22:40 2
Common key binding for 'less' to search for a string

Use the following key binding to search ---------------------------------------------------------------- ng : Jump to line number n. Default is the start of the file. nG : Jump to line number n. Default is the end of the file. /pattern : Search for pattern. Regular expressions can be used. [/ = slash] Press / and then Enter to repeat the previous search pattern. Press ESC and then u to undo search highlighting. n : Go to next match (after a successful search). N : Go to previous match. mletter : Mark the current position with letter. 'letter : Return to position letter. [' = single quote] '^ or g : Go to start of file. '$ or G : Go to end of file. s : Save current content (got from another program like grep) in a file. = or Ctrl+g : File information. F : continually read information from file and follow its end. Useful for logs watching. Use Ctrl+c to exit this mode. -option : Toggle command-line option -option. h : Help.
This is sample output - yours may be different.
-4

less file.ext

totti · 2011-09-13 10:29:27 3
How long has this disk been powered on
This is sample output - yours may be different.
1

smartctl -A /dev/sda | grep Power_On_Hours

totti · 2011-09-09 20:29:46 0
Convert phone book VCARD to text
This is sample output - yours may be different.
0

tr -d "\r" < file.vcf | tr "\0" " " > file.vcf.txt

totti · 2011-09-09 19:21:44 0
Convert windows text file to linux text document
This is sample output - yours may be different.
0

tr -d "\r" < dos.txt > linux.txt

totti · 2011-09-09 18:53:34 0
Batch resize image to exact given resolution ignoring aspect ratio

- Backup data before reszie as it over write original -To preserve aspect ratio remove !
This is sample output - yours may be different.
0

mogrify -resize 600x800! *.jpg

totti · 2011-09-09 18:19:59 0
print all characters of any file in human readble form using hexdump

- View non printable characters. - view binary files Show Sample Output
This is sample output - yours may be different.
```
0000000   B   E   G   I   N   :   V   C   A   R   D  \r  \n   V   E   R
0000010   S   I   O   N   :   2   .   1  \r  \n   N   ;   C   H   A   R
0000020   S   E   T   =   U   T   F   -   8   ;   E   N   C   O   D   I
```
0

hexdump -c <file>

totti · 2011-09-09 09:54:16 0
Gets the english pronunciation of a phrase

No need to install additional packages eg: say hello For multiword say how+are+you
This is sample output - yours may be different.
0

say() { wget -q -U Mozilla -O output.mp3 "http://translate.google.com/translate_tts?tl=en&q=$1"; gnome-terminal -x bash -c "totem output.mp3"; sleep 4; totem --quit;}

totti · 2011-09-07 19:48:53 0
Get rid from a blank display without reboot

Killall5 will kill your session and redirect to login screen. -Very useful when suffering display problems. -Can use F1-F6 -Need to login in the particular console if not already
This is sample output - yours may be different.
1

<Ctrl><Alt><F6> killall5

totti · 2011-09-07 19:19:34 0
Text message on wallpaper

Display some text on the wallpaper especially warning messages
This is sample output - yours may be different.
1

wallpaperWarn() { BG="/desktop/gnome/background/picture_filename"; convert "`gconftool-2 -g $BG`" -pointsize 70 -draw "gravity center fill red text 0,-360 'Warn' fill white text 0,360 'Warn'" /tmp/w.jpg; gconftool-2 --set $BG -t string "/tmp/w.jpg"; }

totti · 2011-09-07 19:00:40 0
Text to image with transparent background

Create transparent image to use as icon, watermark for other images, etc.
This is sample output - yours may be different.
1

convert -background none -pointsize 55 label:"`whoami`" me.png

totti · 2011-09-07 17:06:38 0
Print just line 4 from a textfile

d --> delete !d ---> delete others
This is sample output - yours may be different.
-1

sed '4!d'

totti · 2011-09-05 17:54:57 0
Uptime in minute

Want to run scripts/programs in the system after starting X minute [ For letting the system to free ]? This will give uptime in minute.
This is sample output - yours may be different.
1

bc <<< `uptime | sed -e 's/^.*up //' -e 's/[^0-9:].*//' | sed 's/:/*60+/g'`

totti · 2011-08-29 10:24:43 2
Read/Write output/input from sed to a file

Can't print correctly in the command field. There is a new line before } as follows seq 20 | sed -n '5,6 { w out.txt }' Show Sample Output
This is sample output - yours may be different.
```
$ seq 20 | sed  -n '5,6 { w out.txt 
}'

$ cat out.txt
5
6
```
0

seq 20 | sed '5,6 { w out.txt }' #Can't print correctly. See sample output

totti · 2011-08-29 10:17:47 0
last mounted device
This is sample output - yours may be different.
-3

mount |tail -1 | less -p "/dev/[^ ]*"

totti · 2011-08-28 16:29:42 2
shut of the screen ( Fool proof )

Use the command to create a script and bind it to a key using keyboard shortcut. eg: Script locks the screen in a loop until the command is executed again.At first it
This is sample output - yours may be different.
1

switchMonitor () { LF=/tmp/screen-lock; if [ -f $LF ]; then rm $LF; else touch $LF; sleep .5; while [ -f $LF ]; do xset dpms force off; sleep 2; done; fi };

totti · 2011-08-26 17:55:44 3
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