I have a little problem with a small script.
Getting the below error while executing this. Able to run the below commands Individually.
#!/bin/bash
a=$(printf "%d\n" 0x01E);
b=$(printf "%d\n" 0x01A);
echo $a
echo $b
c=`expr $a - $b`
echo $c
syntax error at line 2: `a=$' unexpected
What is the difference between the printf function in bash and the echo function?
Specifically, running:
echo "blah" >/dev/udp/localhost/8125
did not send the "blah" command to the server listening on 8125, whereas
printf "blah" >/dev/udp/localhost/8125
sent the data. Does printf send an extra EOF at the end of its output?
This is a follow up to a question posted on SO.
I've written a script called except which should print all filenames / directories except the ones given like so.
$ ls
a b c d
$ rm $(except b d)
$ ls
b d
The script I've written so far looks like this
shopt -s extglob
shopt -s nullglob
old_ifs=$IFS
IFS='|'
matches="!($*)"
IFS=' '
printf '%s' $matches
IFS=$old_ifs
This works more or less but
FIXME Stranger, this is a very big topic that needs experience - please fill in missing information, extend the descriptions, and correct the details if you can!
Attention: This is about the Bash-builtin command printf - however, the description should be nearly identical for an external command that follows POSIX(r).
Synopsis
eval: eval [arg ...]
Description
eval takes its arguments, concatenates them, and executes the resulting string as Bash code in the current execution environment. eval in Bash works in essentially the same way as most other languages that have an eval function.
Every time when I close my texstudio after opened by my script below I got this error on the terminal:
QProcess: Destroyed while process is still running.
Here is the script fastex.sh
#!/bin/sh
# Copyleft 2012 by Sigur
caminho=/home/$USER
file=$caminho/fastex-temp
exec 3>&1
exec > "$file".tex
printf '\\documentclass[11pt,a4paper]{amsart}\n'
printf '\\usepackage{amsfonts,amsthm,ams
Code:
lyang0@lyang0-OptiPlex-755:~$ tr 'A-Z' 'a-z' <<< `printf 'DE:EF:BE:%02X:%02X:%02X\n' $((RANDOM%256)) $((RANDOM%256)) $((RANDOM%256))`
de:ef:be:20:a2:e8
lyang0@lyang0-OptiPlex-755:~$ GUEST_MAC=`tr 'A-Z' 'a-z' <<< `printf 'DE:EF:BE:%02X:%02X:%02X\n' $((RANDOM%256)) $((RANDOM%256)) $((RANDOM%256))``
bash: command substitution: line 1: syntax error near unexpected token `n
Hi all I am using printf in my shell script to format my output.I am using the following code.
Code:
printf "|\tIP Address\t|\tModel Number\t|\tDOM/HW\t|\tSoftware Version\t|\n"
printf "|\t%s\t|\t%s\t\t|\t%s\t|\t%s-%s\t\n" $encoder $modelno $type $sv1 $sv2
printf "|\tFPGA DATECODE\
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