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My Personal KB

Cheatsheet

Bash Cheatsheet¶

printf $PASSWORD | kinit $USERNAME@CONTOSO.COM 
klist

Looping & IFS¶

IFS stands for "internal field separator". It is used by the shell to determine how to do word splitting, i. e. how to recognize word boundaries.

THINGS="foo \
bar \
baz"

for THING in THINGS; do
    echo $THING
done

IFS=';'
THINGS="foo;\
bar;\
baz"

for THING in THINGS; do
    echo $THING
done

Unset¶

# remove function
unset -f SomeFunction

Find¶

# find files in ./dir
find ./dir -type f

# find files in ./dir but not with name hidden
find ./dir -type f -not \( -name hidden \)

-maxdepth 1
-type d 
-name '*.md'
-printf "\"%p\" "

Get top 10 IP address with count of established connections¶

ss -tnp | awk '
{
    gsub(/\[::ffff:/, "", $5); gsub(/\]/, "", $5);
    split($5, remote, ":");
    print remote[1];
}' | sort | uniq -c | sort -nr | head -n 10