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Number the lines of a file

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user@server
nl -ba /var/www/vhosts/example.com/httpdocs/.htaccess

Prefixes each line with its number. The -ba option numbers all lines including empty ones, so the count matches editors and error messages. Without -ba, nl skips blank lines when counting.

Note: For a targeted search with line numbers, grep -n muster datei is usually faster.

Also searched as

  • show file with line numbers linux
  • print line numbers command line
  • which line is this on

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Count and sort lines across many files

$find /var/www/vhosts/example.com/httpdocs/wp-content/themes -type f -name '*.php' -exec wc -l {} + | sort -rn | head -n 20
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Print a specific range of lines from a file

$sed -n '100,120p;120q' /var/www/vhosts/example.com/httpdocs/wp-config.php
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Align output as a table with column

$column -t -s ':' /etc/passwd
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Calculate the average, minimum and maximum of a column

$awk -v c=2 'NR == 1 {min = max = $c} {s += $c; if ($c < min) min = $c; if ($c > max) max = $c} END {if (NR) printf "n=%d avg=%.2f min=%s max=%s\n", NR, s/NR, min, max}' measurements.txt
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Compare two lists: what is missing from the second

$comm -23 <(sort -u all-domains.txt) <(sort -u backed-up-domains.txt)
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Convert a JSON array to CSV with a header row

$jq -r '(.[0] | keys_unsorted) as $k | $k, (.[] | [.[$k[]]]) | @csv' plugins.json > plugins.csv
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