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.
(cd /var/log && ls syslog* | sort -n -t. -k2 | while read file; do echo "===== $file ====="; zcat "$file" || cat "$file"; done)
mv file dir/ && cd "$_" && pwd
find . -type f -empty -prune -o -type f -printf "%s\t" -exec file --brief --mime-type '{}' \; | awk 'BEGIN {printf("%12s\t%12s\n", "bytes", "type")} {type = $2; a[type] += $1} END {for (i in a) printf("%12u\t%12s\n", a[i], i) | "sort -nr"}'
echo -e "From: me\n\n$(tail -n1 /var/log/apache2/error.log)" >> file
find /path/to/drive -type f -exec file -b '{}' \; -printf '%s\n' | awk -F , 'NR%2 {i=$1} NR%2==0 {a[i]+=$1} END {for (i in a) printf("%12u %s\n",a[i],i)}' | sort -nr
file /proc/*/fd/* 2>/dev/null | grep Flash | cut -f1 -d: