Here is some example of using curl to login to site, use cookie to do further requests.
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curl -k --cookie-jar ./cookies_hotfile --data "returnto=%2F&user=USERNAME_HERE&pass=PASSWORD_HERE" http://site.com/login.php curl -L -O --cookie ./cookies_hotfile http://site.com/dl/5222/4444/file.zip.html |
See curl […]
chown command is ued to change ownership of a file or folder In this example ownership of folder public_html to username and group specified.
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chown -R username:group public_html |
-R used for recursively change ownership, that is all files and folders inside the folder also get the new ownership. See Linux Commands […]
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yum install at |
Enable atd
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[root@server12 ~]# service atd status atd is stopped [root@server12 ~]# chkconfig --list | grep atd atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off [root@server12 ~]# service atd start Starting atd: [ OK ] [root@server12 ~]# |
Setting Job
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[root@server12 ~]# echo "/sbin/shutdown -h now" | at 21:15 16.02.2017 job 1 at 2017-02-16 21:15 [root@server12 ~]# atq 1 2017-02-16 21:15 a root [root@server12 ~]# |
Deleting at job
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[root@server12 ~]# atq 1 2017-02-16 21:15 a root [root@server12 ~]# man atq [root@server12 ~]# atrm 1 [root@server12 ~]# atq [root@server12 ~]# |
See linux commands […]
To test if pop3 mailbox work using telnet, use
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telnet MAIL_SERVER_IP 110 user YOUR_EMAIL_ADDRESS pass YOUR_EMAIL_PASSWORD |
Once logged in, you can use commands like
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STAT LIST RETR DELE RSET TOP QUIT |
See telnet […]
To auto upgrade software packages in Ubuntu/Debian, install
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apt install -y unattended-upgrades |
Edit
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vi /etc/apt/apt.conf.d/50unattended-upgrades |
In this file, you can configure various settings. See apt […]
rpmquery command allow you to check if a specific rpm package installed on your computer.
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rpmquery PKG_NAME |
Example
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root@server20 [~]# rpmquery nmap nmap-6.40-19.el7.x86_64 root@server20 [~]# |
See rpm […]
PowerDNS is an OpenSource DNS server. Update apt repo
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apt-get update && apt-get upgrade -y |
On Ubuntu, systemd-resolved listen to port 53. This is a local DNS resolver, we need to stop this service before we can install PowerDNS.
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systemctl disable systemd-resolved systemctl stop systemd-resolved rm -f /etc/resolv.conf echo "nameserver 1.1.1.1" > /etc/resolv.conf echo "nameserver 8.8.8.8" >> /etc/resolv.conf |
To install PowerDNS with MySQL backend, run
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apt install pdns-server pdns-backend-mysql |
Since we are using MySQL backend to store DNS zones, we need […]
hosts file allow you to override DNS. This will allow you to point a domain to difernt IP address on your computer. It is helpful for testing sites during site migrations. If you edit hosts file a lot, it is better to make it owned by you or make it editable by everyone.
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sudo chmod 777 /etc/hosts |
Now […]
RAID 5 Requires 3 or more physical disks. It provides the redundancy of RAID 1 combined with the speed and size benefits of RAID 0. RAID 5 uses striping, like RAID 0, but also stores parity blocks distributed across each member disk. In the event of a failed disk, these parity blocks are used to […]
On a Linux server /tmp partition was only 1 GB, it get full at times. Server had following in its /etc/fstab file
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[root@imeicheck-2020 ~]# cat /etc/fstab UUID=c0f46bb1-c0bc-4199-95d6-551d03c12a0a / xfs defaults 1 1 /var/.tempdisk /tmp ext4 loop,rw,noexec,nosuid,nodev,nofail 0 0 /tmp /var/tmp none bind 0 0 [root@imeicheck-2020 ~]# |
Currenly file /var/.tempdisk is mounted as /tmp. So i created a new file with 4 GB size
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dd if=/dev/zero of=/var/sok_tmp bs=1M count=4096 |
Format it as ext4 file system
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mkfs -t ext4 /var/sok_tmp |
Before i swith /tmp to newly created […]