Commands by metropolis

Commands by metropolis (6)

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List the binaries installed by a Debian package

GNU grep's perl-compatible regular expression(PCRE).
This is sample output - yours may be different.
1

binaries () { dpkg -L "$1" | grep -Po '.*/bin/\K.*'; }

metropolis · 2019-10-05 10:52:15 140
List all ubuntu installed packages in a single line

Use xargs command to make one line.
This is sample output - yours may be different.
0

dpkg --get-selections | grep -Evw 'deinstall$' | cut -f1 | sort -u | xargs

metropolis · 2019-08-26 15:57:52 94
delete at start of each line until character

GNU grep's PCRE(Perl-compatible regular expressions).
This is sample output - yours may be different.
1

grep -Po '^(.*?:\K)?.*'

metropolis · 2019-08-21 01:34:17 99
Using a single sudo to run multiple && arguments

Bash's here string
This is sample output - yours may be different.
12

sudo -s <<< 'apt update -y && apt upgrade -y'

metropolis · 2019-08-07 14:03:30 45
shell bash iterate number range with for loop

Bash's arithmetic evaluation.
This is sample output - yours may be different.
5

for((i=1;i<=10;i++)){ echo $i; }

metropolis · 2019-07-28 02:32:09 54
draw line separator (using knoppix5 idea)
This is sample output - yours may be different.
2

printf '*%.s' {1..40}; echo

metropolis · 2019-07-01 07:41:18 47

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Print a row of characters across the terminal

shorter than alternative

get detailed info about a lan card on HP-UX 11.31

convert video to gif by ffmpeg and imagemagick

you can use any common video format. if you don't need to change the size of gif output, just remove `-vf scale=320:-1` btw, 320:-1 means width is 320px and height would be set automatically

All IP connected to my host

find all computer connected to my host through TCP connection.

Save a file you edited in vim without the needed permissions (no echo)

Write a file you edited in Vim but that you do not have the permissions to write to (unless you use sudo.) Same as #1204 but without the echo to stdout that I find annoying.

get stdout to variable and stdout at sametime

Sometimes you want to write the script output to stdout but you need to send it to email. If you use: $ var="$( ls / )"; $ echo -e "$var"; works but, you need to wait the script terminate to bufferize then print the output var; With this way, you can use/work/print the output before the variable receive all the output content, then after it you can use the variable for anything else, like send email.

Find usb device in realtime

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

ROT13 whole file in vim.

gg puts the cursor at the begin g? ROT13 until the next mov G the EOF

Rename files in batch

command line Google I'm Feeling Lucky

opens the Google I'm Feeling Lucky result in lynx, the command line browser

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