Difference between revisions of "Sample Scripts"

Latest revision as of 19:22, 23 June 2021

Script using if

 #!/bin/bash
echo -e "This program adds entries to a family database file . \n"
echo -e "Would you like to add an entry to the family database file? \n"
read ANSWER1
if [ $ANSWER1 = "y" -o $ANSWER1 = "Y" ]
then
echo -e "Please enter the name of the family member --> \c"
read NAME
echo -e "Please enter the family menber's relation to you (i.e. mother) -->\c"
read RELATION
echo -e "Please enter the family member's telephone number -->\c"
read PHONE
echo -e "$NAME\t$RELATION\t$PHONE">>database
fi
echo -e "Would you like to search an entry in the family databae file?\n"
read ANSWER2
if [ $ANSWER2="y" -o $ANSWER2="Y" ]
then
echo -e "What word would you like to look for? -->\c"
read WORD
grep "$WORD" database
fi

Script using CASE

#!/bin/bash
while true
do
clear
echo -e "What would you like to do?
Add and entry (a)
Search an entry (s)
Quit (q)
Enter your choice (a/s/q)-->\c"
read ANSWER
case $ANSWER in
a|A) echo -e "Please enter the name of the family member -->\c"
read NAME
echo -e "Please enter the family member's relation to you (i.e. mother) -->\c"
read RELATION
echo -e "Please enter the family member's telephone number -->\c"
read PHONE
echo -e "$NAME\t$RELATION\t$PHONE" >>database
;;
s|S) echo -e "What word would you like to look for?-->\c"
read WORD
grep "$WORD" database
sleep 4
;;
q|Q) exit
;;
*) echo "You must enter either the letter a or s"
sleep 4
;;
esac
done

While Loop

#!/bin/bash
index=1
while [ $index -lt 6 ]
do
echo "hello ${index}"
((index++))
done


while [ "$correct" != "y" ]
do
        read -p "enter your name:" name
        read -p "is ${name} matched" correct
done

Files in folder to html

echo "print directory conents to file"
echo -e "what is the title---->\c"
read title
sleep 1
echo -e '<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>' > index.html
sleep 2
echo -e $title >> index.html
sleep 2
echo '</title>' >> index.html
sleep 2
echo -e '</head>
<body>' >> index.html
sleep 2
echo '<h1>' >> index.html
sleep 2
echo $title >> index.html
sleep 2
echo '</h1>' >> index.html
sleep 2
ls | awk -F: '{print "<p> <a href=\""$1  "\">"$1 "</a></p>"}' >> index.html
sleep 2
echo -e '</body></html' >> index.html

Reading a file, line by line

read -p "Enter Filename " FILENAME
grep [rR]obert $FILENAME | while read LINE
do
echo "<p> ${LINE}</p>"
done

Send Find and replace to a separate file

read -p "Enter Filename " FILENAME
sed 's/[rR]obert'xor/g' > two.txt
sleep 2
#clear output file
echo " Cleaned file " > three.txt
grep -n -i xor two.txt | while read LINE
do
echo "<p> ${LINE} </p>" >> three.txt
done
clear
echo "--------- two.txt -------------"
cat two.txt
echo ""
echo "------three.txt ----------------"
cat three.txt

Backup MYSQL Database

#!/bin/bash
mdate=`date +%F`
echo "================ backing up databasename database =============="
mysqldump -u username -ppassword databasename > databasename-$mdate.sql
sleep 5
echo "================ backing up databasename ===================="
mysqldump -u username -ppassword databasename > databasename-$mdate.sql
sleep 5
echo  "=============== Backing up databasename database ============="
mysqldump -u username -ppassword databasename > databasename-$mdate.sql
sleep 5
echo " ========= done ========="
ls  *.sql > /var/www/sqlfiles.txt
sleep 5
# calls another script which does the actual backup to amazon
cd /var/dirtoscripts/
./bksql.sh

Backup HTML Directory

#!/bin/bash
bkdate = `date +%F`
cd /var/www/
sleep 1
filename=outwaterphotogallery-$bkdate.zip
#zip html folder
zip -r $filename /var/www/html
sleep 5
if [ "$filename" ]; then
aws s3 cp --region us-east-1 $filename s3://websitebackup-opi/web/
fi
sleep 4
count=`ls -l *.zip | wc -l 2> /dev/null`
if [ $count -ge 1 ]; then
mv *.zip /var/www/backups/web/
fi

Script that backs up to Amazon S3

#!/bin/bash
echo "--------- backing up to s3 --------------"
set -e
if [ -f sqlfiles.txt ]; then
while read line
do
aws s3 cp --region us-east-1  $line s3://bucketname
done < sqlfiles.txt

echo "++++++++++= Done  =+++++++++++++++"
else
echo " XXXXXXXXXXX  File Does not exist XXXXXXX"
fi
cd /var/www/dirtoscripts/
# call script that counts the num of sql files in dir and move them to an archive folder
./cleanupscript

Regex

metacharacters	meaning
^	Matches the beginning of a string.
$	Matches the end of a string.
.	Matches any character, except a newline.
*	Matches occurrences of the preceding character, or group of characters, zero or more times.
+	Matches occurrences of the preceding character, or group of characters, one or more times.
?	Match occurrences of the preceding character, or group of characters, zero or one times.

If used after a repetition modifier, '?' specifies that the shortest possible match should be used. For instance, 'a{2,4}?' will match 'aa' even if 'aaa' and 'aaaa' would also match. See repetition modifiers, below.
|	Alternation; behaves like a boolean 'OR'. For instance, 'butter|jelly' will match either butter or jelly.
(...)	Grouping. For instance, '(eg|le)gs' will match either 'eggs' or 'legs'.
[...]	A set of characters. For instance, '[abc]' will match either 'a' or 'b' or 'c'. Character sets can be defined as:

[characters]	Matches any one of the characters listed.
[x-y]	Matches any in a range of characters between x and y, inclusive. For instance, '[c-e]' will match either c, d, or e, and '[a-z]' will match any lowercase letter.
[^characters]	Does not match characters; in other words, matches any character except those listed. Can also negate a character range; for instance, '[^a-d]' matches any character except a, b, c, or d.
[\-]	Matches the hyphen character ("-").
[x-yX-Z]	Multiple character ranges can be placed in a character set consecutively. For instance, '[a-zA-Z]' matches any letter, uppercase or lowercase.
{m[,[n]]}	A repetition modifier which matches at least m and at most n of the preceding characters. For instance, 'a{2}' will match 'aa', 'a{2,4}' will match either 'aa', 'aaa', or 'aaaa', and 'b{2,}' will match two or more consecutive b characters.
\	Escapes a metacharacter so that it is treated literally. For instance, '\+' matches a literal '+' (instead of the plus symbol having its special metacharacter meaning).
\t	Matches a tab character.
\n	Matches a newline character.
\r	Matches a carriage return character.
\w	Matches any single character classified as a "word" character (either an alphanumeric character or an underscore '_').
\W	Matches any single non-"word" character.
\s	Matches any single whitespace character (space, tab, newline).
\S	Matches any single non-whitespace character.
\d	Matches any digit character. This switch is equivalent to the character set '[0-9]'
\D	Matches any non-digit character.
\b	A "zero-width" matching assertion which matches any "word boundary".
\B	A "zero-width" matching assertion which matches any non-"word boundary".

First part is the path where your files are located. Don’t use wildcard * if you have a lot of files because you will get Argument list too long error.
Second part -type is the file type f stands for files
Third part -name is limiting *,jpg files
Fourth part -mtime gets how many days the files older than will be listed. +30 is for files older then 30 days.
Fifth part -exec executes a command. In this case mv is the command, {} gets the filelist, path where to move the files and \; closes the command

Bash menu- Home

Difference between revisions of "Sample Scripts"

Latest revision as of 19:22, 23 June 2021

Contents

Script using if

Script using CASE

While Loop

Files in folder to html

Reading a file, line by line

Send Find and replace to a separate file

Backup MYSQL Database

Backup HTML Directory

Script that backs up to Amazon S3

Regex

Bash menu- Home

Navigation menu