Commands by swarzynski

Commands by swarzynski (10)

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Find non-ASCII and UTF-8 files in the current directory
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec file {} + | grep "UTF-8\|extended-ASCII"

swarzynski · 2020-09-15 09:10:02 18
Replace lines in files with only spaces/tabs with simple empty line (within current directory - recursive)
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec sed -i 's/^[[:blank:]]\+$//g' {} +

swarzynski · 2020-09-15 09:07:08 10
Make mirror of ftp directory
This is sample output - yours may be different.
0

wget -m --ftp-user=root --ftp-password=pass -A "*.csv" -nd -P "dirname" ftp://46.46.46.46/../mnt/sd/

swarzynski · 2016-08-31 10:59:07 0
Resize all images in folder
This is sample output - yours may be different.
0

mogrify -resize 25% *.jpg

swarzynski · 2016-06-10 18:14:08 0
Check syntax of remote ruby file
This is sample output - yours may be different.
1

wget --quiet 'https://raw.githubusercontent.com/rahult/books/master/well_grounded_rubyist/threads/rps.rb' - | ruby -c

swarzynski · 2016-02-18 11:14:55 1
Copy all files in subfolders to one folder
This is sample output - yours may be different.
0

find . -type f -exec cp '{}' /path/to/all/folder \;

swarzynski · 2015-12-17 18:04:40 0
Search for files with non-Unix line endings
This is sample output - yours may be different.
0

egrep -l $'\r'\$ *

swarzynski · 2015-11-19 10:57:47 0
Run 'tail' on selected files in current directory
This is sample output - yours may be different.
0

for i in *.csv; do tail $i; done

swarzynski · 2015-11-19 10:07:59 0
Merge files in current directory
This is sample output - yours may be different.
0

find . -type f -name '*.csv' -exec cat {} + >> merged.csv

swarzynski · 2015-11-19 10:06:21 0
Rename selected files in the directory using ruby
This is sample output - yours may be different.
0

ruby -e 'Dir.glob("*.txt") { |f| File.rename(f,f.gsub("_t","")) }'

swarzynski · 2015-11-19 09:59:47 0

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Force machine to reboot no matter what (even if /sbin/shutdown is hanging)

This will cause your machine to INSTANTLY reboot. No un-mounting of drives or anything. Very handy when something has gone horribly wrong with your server in that co-location facility miles away with no remote hands! Suspect this works with all 2.2, 2.4 and 2.6 Linux kernels compiled with magic-syskey-request support.

urldecoding with one pure BASH builtin

You can use ordinary printf to convert "%23%21%2fbin%2fbash" into "#!/bin/bash" with no external utilities, by using a little known printf feature -- the "%b" specifier converts shell escapes. Replace % with \x and printf will understand the urlencoded string. BASH's printf has an extension to set a variable directly, too. So you get to convert urlencoded strings from garble to plaintext in one step with no externals and no backticks.

Encrypted archive with openssl and tar

The lifehacker way: http://lifehacker.com/software/top/geek-to-live--encrypt-your-data-178005.php#Alternate%20Method:%20OpenSSL "That command will encrypt the unencrypted-data.tar file with the password you choose and output the result to encrypted-data.tar.des3. To unlock the encrypted file, use the following command:" $ openssl des3 -d -salt -in encrypted-data.tar.des3 -out unencrypted-data.tar

search for a file in PATH

Also searches for aliases and shell builtins

check open ports without netstat or lsof

A very quick and slick fork bomb. Handle with care. Don't run on production please...

Rename files in batch

Output files without comments or empty lines

Filter comments and empty lines in files. I find this very useful when trying to find what values are actually set in a very long example config file. I often set an alias for it, like : alias nocomment='grep -v "^$$\|#$"'

list block devices

Shows all block devices in a tree with descruptions of what they are.

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