Basic Linux Commands

 httrack

httrack "https://www.example.com" -O "<output_location>" -#L999999999 -disable-security-limits

-#LXXXX - Max urls
-disable-security-limits - No Connection speed limit

 

Tar

tar -czvf name-of-archive.tar.gz /path/to/directory-or-file

Here’s what those switches actually mean:

• -c: Create an archive.
• -z: Compress the archive with gzip.
• -v: Display progress in the terminal while creating the archive, also known as “verbose” mode. The v is always optional in these commands, but it’s helpful.
• -f: Allows you to specify the filename of the archive.

 tar cv <path-to_file-or-dir> | gzip -9 <dest-file-name>

utility         cpu    format  size(bytes)
gzip -9         0.02s  gz      105,628
advdef -2       0.07s  gz      102,619
7z -mx=9 -tgzip 0.42s  gz      102,297
advdef -3       0.55s  gz      102,290
advdef -4       0.75s  gz      101,956
xz -9           0.03s  xz       91,064
xz -3e          0.15s  xz       90,996 

 Screen

screen -S file

Create a new screen session 

screen -ls 

List all session

screen -d 1643

Detach a screen sessiom (Ctrl+A+D for current session)

screen -r 1643

Reattach a screen session

Disk Usage:

sudo du -sh /var

Let’s explain the command and its arguments:

• The command starts with sudo because most of the files and directories inside the /var directory are owned by the root user and are not readable by the regular users. If you omit sudo the du command will print “du: cannot read directory”.
• s - Display only the total size of the specified directory, do not display file size totals for subdirectories.
• h - Print sizes in a human-readable format (h).
• /var - The path to the directory you want to get the size.

du -h /var/ | sort -rh | head -5 

Split Large Files:

split [options] filename prefix

  -l linenumber

  -b bytes

Examples

• In this simple example, assume myfile is 3,000 lines long:

    split myfile

  This will output three 1000-line files: xaa, xab, and xac.

• Working on the same file, this next example is more complex:

    split -l 500 myfile segment

  This will output six 500-line files: segmentaa, segmentab, segmentac, segmentad, segmentae, and segmentaf.

• Finally, assume myfile is a 160KB file:

    split -b 40k myfile segment

  This will output four 40KB files: segmentaa, segmentab, segmentac, and segmentad.

   

   

  Split and combine:

  split -b 100M Linux\ Security.mp4 ls.

  cat ls.?? > Linux_security.mp4 
  

  FTP:

  Below are some of the most common FTP commands

• help or ? - list all available FTP commands.
• cd - change directory on the remote machine.
• lcd - change directory on the local machine.
• ls - list the names of the files and directories in the current remote directory.
• mkdir - create a new directory within the current remote directory.
• pwd - print the current working directory on the remote machine.
• delete - remove a file in the current remote directory.
• rmdir- remove a directory in the current remote directory.
• get - copy one file from the remote to the local machine.
• mget - copy multiple files from the remote to the local machine.
• put - copy one file from the local to the remote machine.
• mput - copy one file from the local to the remote machine.
• passive - make connection passive