Ada beberapa opsi untuk mencadangkan data Anda di Linux . Anda dapat menggunakan beberapa program perangkat lunak yang tersedia secara bebas, seperti fwbackups dan Sbackup . Namun, ada metode sederhana untuk mencadangkan direktori tanpa menginstal perangkat lunak tambahan apa pun.

Kami akan membuat skrip shell menggunakan variabel, perintah tar dan perintah tanggal^(date) untuk membuat file cadangan bertanggal dari sebuah direktori, dengan subdirektorinya.

Skrip shell pada dasarnya adalah file yang berisi daftar perintah yang dijalankan secara berurutan. Jika Anda memiliki serangkaian perintah yang dijalankan secara teratur, akan sangat membantu jika Anda membuat skrip shell yang berisi perintah-perintah ini. Kemudian, Anda hanya perlu menjalankan file skrip untuk menjalankan perintah.

Membuat File Skrip Shell

Untuk contoh ini, kita akan membuat skrip shell untuk membuat cadangan direktori yang berisi file untuk panduan pengguna. Kami menggunakan lingkungan Gnome di Ubuntu .

Pertama, akses direktori home Anda, dengan memilih Home Folder dari menu Places . File Browser^{(File Browser)} terbuka ke direktori home Anda.

Kami akan membuat file kosong baru di mana kami akan memasukkan perintah untuk melakukan pencadangan. Klik^{(Right-click)} kanan di panel kanan dan pilih Create Document | Empty File dari menu pop-up.

Sebuah file ditambahkan ke daftar dan siap untuk diganti namanya. Ketikkan^(Type) nama untuk file tersebut, berikan file tersebut ekstensi .sh .

Untuk contoh ini, kami menamai file kami user_guide_backups.sh .

Sekarang kita perlu menambahkan perintah ke file. Klik kanan pada nama file dan pilih Buka dengan gedit^{(Open with gedit)} dari menu pop-up.

File terbuka di gedit . Masukkan baris berikut ke dalam file dan klik Simpan^(Save) . Tujuan dari setiap baris tercantum di bawah ini.

CATATAN:^(NOTE:) Anda juga dapat menyalin teks berikut dan menempelkannya ke gedit . Pastikan untuk mengubah <username> menjadi nama pengguna Anda.

#!/bin/bash
 SRCDIR="/home/<username>/Documents/my_work/"
 DESTDIR="/home/<username>/Backups/"
 FILENAME=ug-$(date +%-Y%-m%-d)-$(date +%-T).tgz
 tar – create – gzip – file=$DESTDIR$FILENAME $SRCDIR

Deskripsi Baris demi Baris

Tabel berikut menjelaskan apa yang ada di setiap baris dalam file skrip shell.

Line #	Description
1	This line must be the first line in a bash shell script, which is the default type of script.
2	This line sets up a variable called SRCDIR and sets the value of it to the directory to be backed up. NOTE: Be sure to replace <username> with your username.
3	This line sets up a variable called DESTDIR and sets the value of it to the directory into which the backup file will be written. NOTE: Be sure to replace <username> with your username.
4	This line sets up a variable called FILENAME and sets the value using text and variables containing the date command to add the current date and time to the filename. For example, the filename might be ug-20100212-13:03:45.tgz. NOTE: When using a variable, always start it with the dollar sign ($). If you use a command as part of a variable, enclose the command and the options for the command in parentheses.
5	This line is the tar command with the following function and options added. –create This function creates a new archive (or truncates an old one if the filename specified already exists) and writes the named files or directory to it. –gzip This option tells tar to compress the files in the archive using the gzip utility. –file This option gives tar the filename to use. In this case, we assembled the filename using the DESTDIR, FILENAME, and SRCDIR variables.

Mengedit Izin^{(Permissions)} pada File Skrip Shell^{(Shell Script File)}

Sebelum menjalankan skrip, Anda perlu memastikan file memiliki izin yang benar. Untuk melakukan ini, buka Folder Beranda^{(Home Folder)} Anda lagi seperti yang disebutkan di atas dan klik kanan pada file skrip shell. Pilih Properti^(Properties) dari menu pop-up.

Kotak dialog Properti ditampilkan. ^(Properties)Pastikan^(Make) kotak centang Jalankan dipilih.^(Execute)

Klik Tutup^(Close) .

Menjalankan Skrip Shell

Untuk menjalankan skrip shell, buka jendela terminal dengan memilih Accessories | Terminal dari menu Aplikasi^{(Applications)} .

Saat jendela Terminal terbuka, Anda seharusnya berada di Folder Rumah^{(Home Folder)} secara default. Mengetik pwd pada baris perintah dan menekan enter menegaskan fakta ini. Saat diminta, ketik ./user_guide_backups.sh dan tekan Enter .

Anda harus memiliki file .tgz di folder Cadangan di Folder ^(Backups)Beranda^{(Home Folder)} Anda . Jika Anda mengklik kanan pada nama file, Anda akan melihat beberapa opsi untuk membuka arsip di salah satu program pengarsipan yang tersedia, atau mengekstrak file langsung ke folder Backup menggunakan perintah ^(Backups)Extract Here .

Informasi lebih lanjut

Tautan di bawah ini memberikan informasi lebih lanjut tentang skrip shell, perintah tar dan tanggal^(date) , dan perintah Linux lainnya .

membuat skrip

Panduan cepat untuk menulis skrip menggunakan bash shell^{(A quick guide to writing scripts using the bash shell)}

Bash Shell Scripting – 10 Seconds Guide | All about Linux

Manual Referensi Bash^{(Bash Reference Manual)}

Perintah Linux

tar Halaman MAN^{(tar MAN Page)}

tanggal Halaman MAN^{(date MAN Page)}

perintah bash – Halaman MAN Linux^{(bash commands – Linux MAN Pages)}

Menjelajahi halaman-halaman ini akan membantu Anda membuat skrip bash shell Anda sendiri yang berguna.

Back Up a Directory in Linux using a Shell Script

There are several options for backing up your data in Linux. You can use some freely aνailable software programs, such as fwbackups and Sbackup. However, there is a simple method of backing up a directory without installing any extra software.

We will create a shell script using variables, the tar command and the date command to create a dated backup file of a directory, with its subdirectories.

A shell script is essentially a file containing a list of commands that are run in sequence. If you have a series of commands you regularly run in order, it is helpful to create a shell script containing these commands. Then, you only have to run the script file to run the commands.

Creating the Shell Script File

For this example, we are going to create a shell script to backup a directory containing files for a user guide. We are using the Gnome environment in Ubuntu.

First, access your home directory, by selecting Home Folder from the Places menu. The File Browser opens to your home directory.

We are going to create a new empty file in which we will enter the commands for performing the backup. Right-click in the right pane and select Create Document | Empty File from the pop-up menu.

A file is added to the list and is ready to be renamed. Type in a name for the file, giving the file an extension of .sh.

For this example, we named our file user_guide_backups.sh.

Now we need to add the commands to the file. Right-click on the name of the file and select Open with gedit from the pop-up menu.

The file opens in gedit. Enter the following lines into the file and click Save. The purpose of each line is listed below.

NOTE: You can also copy the following text and paste it into gedit. Be sure to change <username> to your username.

#!/bin/bash
 SRCDIR="/home/<username>/Documents/my_work/"
 DESTDIR="/home/<username>/Backups/"
 FILENAME=ug-$(date +%-Y%-m%-d)-$(date +%-T).tgz
 tar – create – gzip – file=$DESTDIR$FILENAME $SRCDIR

Line-by-Line Description

The following table describes what each line is in the shell script file.

Line #	Description
1	This line must be the first line in a bash shell script, which is the default type of script.
2	This line sets up a variable called SRCDIR and sets the value of it to the directory to be backed up. NOTE: Be sure to replace <username> with your username.
3	This line sets up a variable called DESTDIR and sets the value of it to the directory into which the backup file will be written. NOTE: Be sure to replace <username> with your username.
4	This line sets up a variable called FILENAME and sets the value using text and variables containing the date command to add the current date and time to the filename. For example, the filename might be ug-20100212-13:03:45.tgz. NOTE: When using a variable, always start it with the dollar sign ($). If you use a command as part of a variable, enclose the command and the options for the command in parentheses.
5	This line is the tar command with the following function and options added. –create This function creates a new archive (or truncates an old one if the filename specified already exists) and writes the named files or directory to it. –gzip This option tells tar to compress the files in the archive using the gzip utility. –file This option gives tar the filename to use. In this case, we assembled the filename using the DESTDIR, FILENAME, and SRCDIR variables.

Editing the Permissions on the Shell Script File

Before running your script, you need to make sure the file has the correct permissions. To do this, open your Home Folder again as mentioned above and right-click on the shell script file. Select Properties from the pop-up menu.

The Properties dialog box displays. Make sure the Execute check box is selected.

Click Close.

Running the Shell Script

To run the shell script, open a terminal window by selecting Accessories | Terminal from the Applications menu.

When the Terminal window opens, you should be in your Home Folder by default. Typing pwd on the command line and pressing enter confirms this fact. At the prompt, type ./user_guide_backups.sh and press Enter.

You should have a .tgz file in the Backups folder in your Home Folder. If you right-click on the filename, you see several options for opening the archive in one of the available archiving programs, or extracting the files directly to the Backups folder using the Extract Here command.

More information

The links below provide more information about shell scripts, the tar and date commands, and other Linux commands.

Scripting

A quick guide to writing scripts using the bash shell

Bash Shell Scripting – 10 Seconds Guide | All about Linux

Bash Reference Manual

Linux Commands

tar MAN Page

date MAN Page

bash commands – Linux MAN Pages

Exploring these pages will help you to construct your own useful bash shell scripts.

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