One Liners¶
I need a oneliner that....
Removes blank lines -- on Mac OS¶
sed -i.bak '/^[[:space:]]*$/d' gitlab.rb
An alternative for gitlab.rb and friends:
grep -v '^#' gitlab-rb.txt | gsed 's/#.*$//;/^$/d'
Replaces commas with a newline character¶
Context: I had a log file that was many MB in size but wc reported 0 lines. Why? How? Unknown. Using grep is very painful so let's fix the log.
tr , '\n' < production.log
That's OK.
sed 's/, "/\
/g' production.log
(Silently) Automates the creation of SSH keys¶
⚠️ Use with extreme caution. This suggestion will overwrite ~/.ssh/id_rsa so modify to suit!
ssh-keygen -t rsa -N '' -f ~/.ssh/id_rsa <<< y
In order to test something once, I used this for loop with seq to automate the creation of a bunch of SSH key pairs:
for i in $(seq 1 24) ; do echo $i; mkdir -p ohwowwhoa$i; ssh-keygen -t rsa -N '' -f ./ohwowwhoa$i/id_rsa$i <<< y ; done
Miscellaneous Stuff¶
task export | task2dot | dot -Tsvg > test.svg
task export | task2dot | dot -Tsvg > test.svg && open test.svg
ripgrep¶
rg -g '!{locale/*}' 'or sign in with'