Commands by esplinter

Commands by esplinter (3)

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redirect STDOUT and STDERR to STDOUT and also to a file
This is sample output - yours may be different.
0

command_line 2>&1 | tee -a output_file

esplinter · 2014-04-05 13:02:30 7
backup with mysqldump a really big mysql database to a remote machine over ssh

backup big mysql db to remote machine over ssh. "--skip-opt" option is needed when you can?t allocate full database in ram.
This is sample output - yours may be different.
9

mysqldump -q --skip-opt --force --log-error=dbname_error.log -uroot -pmysqlpassword dbname | ssh -C user@sshserver 'cd /path/to/backup/dir; cat > dbname.sql'

esplinter · 2010-05-29 23:06:04 7
move a lot of files over ssh

Useful to move many files (thousands or millions files) over ssh. Faster than scp because this way you save a lot of tcp connection establishments (syn/ack packets). If using a fast lan (I have just tested gigabyte ethernet) it is faster to not compress the data so the command would be: tar -cf - /home/user/test | ssh user@sshServer 'cd /tmp; tar xf -'
This is sample output - yours may be different.
11

tar -cf - /home/user/test | gzip -c | ssh user@sshServer 'cd /tmp; tar xfz -'

esplinter · 2009-08-24 18:35:38 19

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reduce mp3 bitrate (and size, of course)

Useful if you have to put some mp3 files into mobile devices (ie mobile phones with no much memory)

Simple complete system backup excluding files or directories

You can exclude more system folders or individual files which are not necessary for the backup and can be recreated after the restore procedure, like /lost+found, /mnt, /media, /tmp, /usr ... Restoring the above backup procedure is as simple as becoming root and typing: $ tar zxpf backup.tgz -C / You can extract any file or directory out of the backup.tgz file for recovery, for instance, if you have a corrupt or mis-configured fstab file, you could simply issue the command: $ tar zxpf backup.tgz /ect/fstab -C / Other options: v add verbose option to see files processed A far safer solution is to restore the desired files under a different directory, and then compare, move, or update the files to their original locations afterward.

while using lxde and being blinded by your laptop screen, you can type:

I'm not sure what apt this is, but it seems to work on most X screens, an is useful for saving power, and not straining your eyes

Find and remove core files

zsh suffix to inform you about long command ending

make, find and a lot of other programs can take a lot of time. And can do not. Supppose you write a long, complicated command and wonder if it will be done in 3 seconds or 20 minutes. Just add "R" (without quotes) suffix to it and you can do other things: zsh will inform you when you can see the results. You can replace zenity with other X Window dialogs program.

dont execute command just add it to history as a comment, handy if your command is not "complete" yet

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Check if you work on a virtual/physical machine in Linux

Command used to know if we are working on a virtual or physical machine. This command will use the dmidecode utility to retrieve hardware information of your computer via the BIOS. Run this command as root or with sudo.

Concatenate (join) video files

Use mencoder to concatenate (join) multiple video files together.

rename anime fansubs

renames Anime Episodes to files, that can be parsed by sonarr & co

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