Linux tips and tricks

# this is the first scratch of the file... It will be edited later. I just statr using linux daily
# on laptop. check later for new commands or tips

# generate 100MB lenght file with random content
dd if=/dev/urandom of=~/random_data.bin bs=1024 count=$[1024*100]

# export public key in gpg to external file
# You must entry unique identifier of generated key. It can be for exampe email
# Best choice how to read ID is use "gpg --list-keys". Unique indetifier can be
# after key type.

#Example
gpg --list-keys
# Output

#pub   rsa4096/EC7C1AB7 2014-11-26 [expires: 2016-11-25]
#uid       Real Name (Description) <Email>
#sub   rsa4096/4E2E722F 2014-11-26 [expires: 2016-11-25]

# In this case, unique identifier for public part is EC7C1AB7 and 4E2E722F for private part
# So you can export the key

gpg --export EC7C1AB7 > ~/unique_identifier.pub

# for export public key and

gpg --export-secret-key -a 4E2E722F > ~/arcticfox@post.cz.pub

# for export private part. You will be asked for passphrase if you want export private part