SSH agent forwarding explained by github

sed -i".bak" '3d' filename.txt

Todo

• rotate logs
• startup script for carte server

Software

1. Setup centos 6.5
2. set hostname in /etc/hosts
3. start sshd
4. turn off iptables
5. add EPEL repo

  wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release...

grep "^[^;[]" /etc/php.ini | less

rsync --partial --progress --rsh=ssh user@host:remote_file local_file

https://www.digitalocean.com/community/tutorials/how-to-use-rsync-to-sync-local-and-remote-directories-on-a-vps

If replication is broken by a simple invalid query, i.e. grants change, etc. you can force-skip that query:

stop slave;
SET GLOBAL SQL_SLAVE_SKIP_COUNTER = 1;
start slave;
show slave status\G

Example

knife ssh -x sysadmin.a -a ipaddress "chef_environment:stage" uptime

• always define the user with -x
• always give the ssh attribute -a ipaddress for knife to rely on the ip attributes of the search query result
• the actual sea...

1. Ctrl+Z to stop (pause) the program and get back to the shell
2. bg to run it in the background.
3. disown -h [job-spec] where [job-spec] is the job number (like %1 for the first running job; find about your number with the jobs command) so ...

nohup find /Backup/ -type f -execdir shred -zu -n7 '{}' \; &