unit11_StringProcessing.md

head

• head -n or --line

tail

• tail -n or --line
• cat /var/log/messages
tail -f /var/log/messages

wc

• wc readme
• wc -l readme
• wc -w readme
• wc -c

uniq

• uniq file

• sort file3 | uniq

• sort -u file4

• uniq -c file5

• paste file1 file2 file3 >merge1

diff

diff abc ABC sdiff ABC abc

aspell

aspell check file

formatting tools

• expand file.tab > file2.tab
• fmt
• pr -5 /usr/share/dict/words | less