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bash
Posts: 22
Deleting files older than X days
find /home/ -type f -mtime +7 -exec rm '{}' \; delete files smaller than 5KB find ./ -size -5k -delete delete files larger than 10MB find ./ -size +10m -delete
bash, Deleting every other backup
Pr
Pre-coding the directory on Android.
Conversion of JPG to PDF
install: example: batch conversion script:
Ubuntu in the domain
Creating an rdesktop shortcut with the appropriate monitor resolution
if...then...else... syntax
? if [ condition ]; then if the condition is true, execute all commands until else or fi else if the condition is not true, execute all commands until fi fi It is very important to remember that your construct must always end with the word fi! Expressions...
Copying yesterday's backup in 4 threads
#!/bin/bash # Script for automating file downloads. LogFile=/var/log/backup_db.log NameDay=$((10#`date +%d`-1)) if [ ${#NameDay}=1 ]; then NameDay=0$NameDay fi temp_name=$(date +%m.%Y) NameDate=$NameDay.$temp_name FulName=$NameDate/BACKUP_SQL-$NameDate'_21.00.7z' #echo $FulName echo $(date) - start copy >> $LogFile aria2c "ftp://lomix.com.ua/$FulName" \ --ftp-user=ftpbackup --ftp-passwd=XXXXX \ --dir='/backup/db' --log='/var/log/aria.log' \ --max-concurrent-downloads=4…
Mounting a network drive
#!/bin/sh # Mount a network drive from the seo-studio server sudo apt-get install smbfs mkdir /media/sharedisk cp "/etc/fstab" "/etc/fstab.default" echo "//192.168.4.224/sharedisk /media/sharedisk cifs credentials=/root/.smbcredentials,iocharset=utf8,file_mode=0777,dir_mode=0777,_netdev 0 0" >> /etc/fstab echo "username=sharedisk" > /root/.smbcredentials echo "password=xxxxxxx" >> /root/.smbcredentials cd /etc/rc0.d sudo mv S31umountnfs.sh S19umountnfs.sh
Resource ping function and return value
copying files to FTP
Server=192.168.xxx.xxx Username=clientftp Password=xxxxxx Directory=test LDirectory="/test" Filename="index.php" ftp -n $Server <<End-Of-Session user $Username $Password binary bell cd $Directory lcd $LDirectory put $Filename bye End-Of-Session # If you need to copy multiple files, you can use the mput *.php template
Compiling bash with the help of shc
Download the program from the source http://www.datsi.fi.upm.es/~frosal/, then extract it: mw shc-3.x.x.c shc.c make make test OPTIONS
Blocking those who brute-force SSH passwords
crontab -e ## block those who are brute-forcing the SSH password 59 * * * * sh ~/ssh_security.sh vim ~/ssh_security.sh
Script to block IPs with a large number of simultaneous connections
#!/bin/bash ipban='netstat -an | grep :80 | grep -v 127.0.0.1 | grep -v 0.0.0.0 | awk '{ print $5 }' | sort | awk -F: '{print $1}' | uniq -c | awk '$1 > 20 {print $2}' for ip in $ipban do iptables -A INPUT…
Bash script for creating a network drive
#!/bin/sh # Uncomment for your system to install the samba component #sudo apt-get install smbfs #(for Ubuntu) #sudo zypper install smbfs # (for openSUSE) #sudo yum install smbfs # (for CentOS) mkdir /media/sharedisk cp "/etc/fstab" "/etc/fstab.default" echo "//192.168.4.224/sharedisk /media/sharedisk cifs credentials=/root/.smbcredentials,iocharset=utf8,file_mode=0777,dir_mode=0777,_netdev 0…
How to Create Multiple Network Interfaces in CentOS
#!bin/bash i=0 diapazon=19 while [ $i -lt 255 ] do i=$[$i+1] K_file2="ifcfg-eth1:"$diapazon$i echo 'DEVICE=eth1:'$diapazon$i>$K_file2 echo 'IPADDR=192.168.'$diapazon'.'$i>>$K_file2 echo 'HWADDR=xx:xx:xx:xx:xx:xx'>>$K_file2 echo 'ONBOOT=yes'>>$K_file2 echo $K_file ' created' done
MySQL replication monitoring script
#!/bin/bash # replication monitoring script # and sending me an email in case of an issue # Script written by Dmitry Lomaka, Kyiv 2012 # required: yum install mailx # set up the master server's crontab to run once per hour # crontab -e ## 00 *…
Examples of If Then Else
Nested if Statements Inside an if statement, you can use another if statement. You can use as many levels of nesting as you can handle. In this example, leap years are checked:
Loops.
The for-in Loop The for-in statement is designed to sequentially access values listed in a list. Each value in the list is assigned to a variable in turn. The syntax is as follows: Let's consider a small example: After executing the example, a line with its number will appear in the first 5 virtual consoles (terminals). In...