Sample Scripts
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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