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Search: Posts Made By: cfajohnson
5,030
Posted By cfajohnson
If you have the output in a variable, you don't...
If you have the output in a variable, you don't need any external command:

output='Device "nrst3a" attributes=(0x4) RAW SERIAL_NUMBER=SN[VD073AV1443BVW00083]L2'

IFS=\" read a s1 b <<<...
7,085
Posted By cfajohnson
s/crippled/standard/
s/crippled/standard/
2,379
Posted By cfajohnson
awk 'BEGIN { print "<div align=center>" } {...
awk 'BEGIN { print "<div align=center>" }
{ gsub(/&/,"&amp;"); gsub(/</,"&lt;") }
/^$/ { print; last = "blank"; next }
last == "blank" || NR == 1 {
last = ""
printf " <p>"
}
/THE DISTRICT COURT...
7,085
Posted By cfajohnson
That will only work with the GNU date command; -d...
That will only work with the GNU date command; -d is not standard.



I doubt that OP is using a system without a POSIX shell, so there's no need for cut:

IFS=/ read month day year whatever...
2,568
Posted By cfajohnson
That will fail if $AllFile contains whitespace. ...
That will fail if $AllFile contains whitespace.

}' "$AllFile.tmp" > "$AllFile"
2,632
Posted By cfajohnson
Do not use basename. It is an external command...
Do not use basename. It is an external command that is an order of magnitude slower than using the shell's parameter expansion.
2,632
Posted By cfajohnson
That is almost almost always the wrong way ro...
That is almost almost always the wrong way ro read the contents of a file. Not only is cat unnecssary but it will break your script if any lines contain whitespace or other pathological characters....
1,460
Posted By cfajohnson
With bash there is no need for any external...
With bash there is no need for any external command:


#!/bin/bash
file=$1

mapfile -t xx < "$file"
n=${#xx[@]}
printf "%s\n" "${xx[@]:1:n-2}"
Forum: What is on Your Mind? 06-04-2015
1,306
Posted By cfajohnson
The best places I have found are this forum and...
The best places I have found are this forum and the Usenet newsgroup comp.unix.shell.
2,041
Posted By cfajohnson
First, you don't need -1 when the output of ls is...
First, you don't need -1 when the output of ls is not going to a terminal.

Second, the command will fail if $1 contains whitespace or other pathological characters.

Third, there is no need for...
2,038
Posted By cfajohnson
man bash:"Redirections using file descriptors...
man bash:"Redirections using file descriptors greater than 9 should be used with care, as they may conflict with file descriptors the shell uses internally."
2,504
Posted By cfajohnson
Rather than whereis, use type; It tells you what...
Rather than whereis, use type; It tells you what the shell will actually use:


$ type [
[ is a shell builtin


With the -a option, it gives all the possible commands that could be executed:
...
2,504
Posted By cfajohnson
There is no need to use an external command for...
There is no need to use an external command for integer arithmetic in bash (or any other POSIX shell):

count=$(( count + 1 ))


Or, in bash:


(( ++count ))
892
Posted By cfajohnson
If you want to get a value from the command line,...
If you want to get a value from the command line, use the positional parameters, $1, etc., not 'read'.


case $1 in
1|memory) echo " you've selected check memory..1 sec pls "
...
1,597
Posted By cfajohnson
grep "^$acc;" "$file"
grep "^$acc;" "$file"
5,111
Posted By cfajohnson
There's no point in sourcing the script if you...
There's no point in sourcing the script if you are putting it in the background.

A background process is not executed in the current shell.
2,466
Posted By cfajohnson
There should be no space after file, and you...
There should be no space after file, and you don't need both $( ... ) and ` ... `.

date=$(date +%Y%m%d)
file=$(find . -name "$date"_*.xml)
mv "$file" renamedfeed_"$date".xml
7,200
Posted By cfajohnson
## NAME: topntail ## USAGE: topntail [-b N] [-e...
## NAME: topntail
## USAGE: topntail [-b N] [-e N] [FILE ...]

b=1 ## No. of lines to remove from beginning
e=1 ## No. of lines to remove from end

## Parse command-line options
while...
736
Posted By cfajohnson
Please convert the DOC file to a TXT file. I'm...
Please convert the DOC file to a TXT file. I'm not going to load OpenOffice just for that.
3,346
Posted By cfajohnson
Use the format specifiers to get whatever output...
Use the format specifiers to get whatever output you want. For example:

date +%y%m%d

See the man page for the full list of specifiers.
1,694
Posted By cfajohnson
awk '/^processor/ { processor = $0 } /^model...
awk '/^processor/ { processor = $0 }
/^model name/ { print processor, $0 }
' /proc/cpuinfo

I'll leave the removal of "model name :" to you.
8,241
Posted By cfajohnson
There is nothing in the script that is...
There is nothing in the script that is specifically bash other than ==; = works just as well and is portable.
3,281
Posted By cfajohnson
Put code inside [CODE] tags, not [QUOTE] tags. ...
Put code inside [CODE] tags, not [QUOTE] tags.

(You can edit your post to fix it.)
19,417
Posted By cfajohnson
#!/bin/bash usage="${0##*/} SERVER USER...
#!/bin/bash

usage="${0##*/} SERVER USER PASSWORD [PORT]"

case $1 in
-*|"") printf "USAGE: %s\n" "$usage"; exit ;;
esac

host=${1:-mail.example.com}
user=${2:-poppy}...
1,232
Posted By cfajohnson
logfile=backup_every_hour_script.log { ...
logfile=backup_every_hour_script.log
{
rsync -auv "$dir" "$backup_dir"
cat "$logfile"
} > tmpfile
mv tmpfile "$logfile"
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