The script would:
– extract all file versions to /tmp/all_versions_exported
– take 1 argument – relative path to the file inside git repo
– give result filenames numeric prefix (sortable)
– mention inspected filename in result files (to tell apples apart from oranges:)
– mention commit date in the result filename (see output example below)
– not create empty result files
Automatic Syncing With SSH Keys
#!/usr/bin/env bash
rsync -az –delete /home/kevin/source/ server.example.com:/home/kevin/destination
Copy/Sync a File on a Local Computer
[root@tecmint]# rsync -zvh backup.tar /tmp/backups/
Copy/Sync a Directory on Local Computer
[root@tecmint]# rsync -avzh /root/rpmpkgs /tmp/backups/
Clear the APT cache to reclaim disk space used by the downloaded packages.
1. Update the repository index by executing the below command in Terminal:
$ sudo apt-get update
2. Next, execute the below command to clean out the local repository:
$ sudo apt-get clean
3. Execute the below command to remove all the unnecessary packages that are no longer needed:
$ sudo apt-get autoremove
The above command will display the unmet dependencies or broken package’s name.
DevOps is the combination of application development and operations, which minimizes or eliminates the disconnect between software developers who build applications and systems administrators who keep infrastructure running.
To recursively give directories read&execute privileges:
find /path/to/base/dir -type d -exec chmod 755 {} +To recursively give files read privileges:
find /path/to/base/dir -type f -exec chmod 644 {} +ncftpput -R -v -u «username» ftp.nixcraft.biz /nixcraft/forum /tmp/phpbb
Where,
-u «username» : Ftp server username
-v : Verbose i.e. show upload progress
-R : Recursive mode; copy whole directory trees.
ftp.nixcraft.biz : Remote ftp server (use FQDN or IP).
/nixcraft/forum : Remote ftp server directory where all files and subdirectories will be uploaded.
/tmp/phpbb : Local directory (or list of files) to upload remote ftp server directory /nixcraft/forum
The WP Engine PHP Compatibility Checker can be used by any WordPress website on any web host to check PHP version compatibility.
It can happen when your kernel does not have the CONFIG_SECCOMP_FILTER enabled. But that can hardly change while you «work on website».
As a poor workaround, you can configure vsftpd not to enable the the seccomp mode.
Use the seccomp_sandbox=no option in the vsftpd.conf.
The option does not seem to be documented.
So what is a RAID array? Being here you probably have enough interest in computers to have heard of RAID but unless you are slightly obsessed with hard drive technology you probably haven’t learned much about it. RAID has been, and to a large part still is the domain of higher-level servers.
RAID describes three main abilities that can be implemented either alone or in combination to best fit various scenarios. These features include «stripping», «mirroring» and «parity».
Stripping, known as RAID level 0 or RAID0 is the process of using two or more drives for simultaneous writing and reading. When a file is to be written to a stripped array the data is divided into chunks and written to the drives in the array at the same time. As a loose example you can take a 10MB file and write it to a RAID0 array with two drives in roughly the time it would normally take to write a 5MB file (twice the speed). The same 10MB file could be written to an array with five drives in roughly the time it would have taken a 2MB file to be written to a single drive (five times as fast). Calculating the actual speed benefits isn’t so cut and dry because of other overhead but you get a good idea.
Next up is «Mirroring» or RAID1. As its name implies, two drives are mirror images of one another. If one drive fails the data is safe thanks to the second identical drive. The down side is that 50% of the physical hard drive space is wasted.
Finally we get to «Parity», used in RAID3, 4, 5 and 6 but most popularly in RAID5. Remember in math class you asked «where will I ever use this in the real world?» Well my friends, Boolean algebra has allowed us a very efficient was to protect data. Lets use a RAID5 array for this example but first let me describe a RAID5 array.
In a RAID5 array you need a minimum of 3 disks. The more you add though the better performance you gain and the more efficiently you use your disk space. The trade off is you need an increasingly more powerful RAID controller and that translates to a higher cost. In a RAID5 array performance is increased by stripping data across the available drives (RAID0). In a RAID0 array though a single disk failure will destroy all the data because part of just about every file is on each disk. Parity is added in RAID5 to deal with this.
Update the GRUB config file.
sudo update-grub
Reinstallation of Grub on the device:
sudo grub-install /dev/sdX
This should be it for the rescue part and your system should be good and running.
Lo que se debe hacer es actualizar un directorio en la variable PATH la cual posiblemente al actualizar la rama se pudo desconfigurar.
sudo export PATH=$PATH:/usr/local/sbin:/usr/sbin:/sbin
Y luego para que esta asignacion no se pierda al reinciar el equipo. Se debe configurar la variable PATH de forma permanente editando el archivo de configuración de su shell de conexión. Como por lo general el shell BASH es el más utilizado, debe editar su archivo:
echo 'export PATH=$PATH:/usr/local/sbin:/usr/sbin:/sbin' >> /home/usuario/.bashrc
To find all files in /home/user/demo directory, enter:
find /home/user/demo -type f -print
To find all files in /home/user/demo directory with permission 777, enter:
find /home/user/demo -type f -perm 777 -print
Finally, apply new permission using the -exec option as follows:
$ find /home/user/demo -type f -perm 777 -print -exec chmod 755 {} ;To select directories and subdirectories use the following syntax:
$ find /var/www/html -type d -perm 777 -print -exec chmod 755 {} ;By adding the «-Y» flag to the ssh command, the display will automatically be redirected to your local computer.
ssh -Y <remoteip>
Then, if you start Firefox (or any other X application) in that ssh session, it will be displayed locally. (If you have a xserver running locally of course)
#!/bin/bash #### # This script automatically creates user accounts with random passwords. # # Author: Russ Sanderlin # Date: 01/21/15 # ### if [ $# -lt 1 ]; then echo "Please supply a user name" echo "Example: " $0 "jsmith" exit fi # Declare local variables, generate random password. newuser=$1 randompw=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 8 | head -n 1) # Create new user and assign random password. useradd $newuser echo $newuser:$randompw | chpasswd echo "UserID:" $newuser "has been created with the following password:" $randompw