printf @ bash
printf "My brother %s is %d years old.\n" Prakash 21
Source: linuxhandbook.com
printf linux
#cat file.txt #1.11135 -66.8286 0.382867 24.6386 0.693014 175.409 0.763907 -97.6113 cat file.txt | awk '{printf "%-5s%-10s%8s%10s\n","A",$1,$2,"-1.0"}' ^%-5start from left, keep 5 digit space to right ^%9 start from right, keep 8 digit space to letf output : 1 1.11135 -66.8286 -1.0 #123451234567890123456781234567890 %s a string of characters %c character %d decimal (integer) number (base 10) %e exponential floating-point number %f floating-point number %i integer (base 10) %% print a percent sign \% print a percent sign #advacne version of this, with many new lines, cat file.txt | awk '{printf "%-5s%-10s%8s%10s\n%-5s%-10s%8s%10s\n","A",$1,$2,"-1.0","B",$3,$4,"-2.0"}' ------------------^repeat var=0.00 awk '{printf "%4s%7.0f%3s%6s%2s%4.0f%12.3f%8.3f%8.3f%6.2f%7.2f\n", $1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $var}' < a.pdb >> dest.pdb more https://alvinalexander.com/programming/printf-format-cheat-sheet/
printf inside printf linux
printf " $(somecommands_with_prinf) $(somecommands_with_prinf) \n" eg : printf "$(cat fol/combine/epsi_parameters.txt | awk '{printf "%-5s%-10s%8s\n","A",$1,$2}') $variable \n" add many commands inside $() and .... \n at end 0