cat file
less file
more file
head file
tail file
dd < file
paste file
tac file
nl file
pr file
grep "." file
sed -n '1,$p' file
awk '1' grep
sort file
xxd file
od file | ......?
hexdump -C  file
base64 file | base64 -d
nc -lvp 8000 & nc localhost 8000 < file
ln -sf /dev/stdout file1 && cp file file1

perl -e '{print <>}' < file

python -m SimpleHTTPServer 8000 &
curl http://localhost:8000/file

./1.sh `<file`, где 1.sh c помощью echo выведет аргументы на экран

#!/bin/bash
while read -r line
do
  echo "$line"
done <"file"

printf '#include <stdio.h>\n main(int argc, char const *argv[]){FILE * p;char c;p = fopen(argv[1], "r");do{c = fgetc(p);putchar(c);} while(c!=EOF);}' | cc -x c - > /dev/null 2>&1 && ./a.out file && rm a.out