bashoneliners.com

Welcome to bashoneliners.com, a curated collection of practical and well-explained Bash one-liners, snippets, tips and tricks. We aim to make each published one-liner to be of high quality: useful, easy to read, follows best practices, with clear, detailed, accurate explanation. These one-liners should help you automate tasks, troubleshoot problems, whether it be in system administration, file management, networking or programming.

Remove offending key from known_hosts file with one swift move 

vi +18d +wq ~/.ssh/known_hosts

October 30, 2012 — bashoneliners

Remove carriage return '\r' character in many files, without looping and intermediary files 

vi +'bufdo set ff=unix' +'bufdo %s/^M$//' +q file1 file2 file3

March 30, 2012 — bashoneliners

Sort and remove duplicate lines in a file in one step without intermediary files 

vi +'%!sort | uniq' +wq file.txt

March 22, 2012 — bashoneliners

Replace a regexp pattern in many files at once 

vi +'bufdo %s/pattern/replacement/g | update' +q $(grep -rl pattern /path/to/dir)

September 15, 2011 — bashoneliners