Linux

man pstree pstree -V pstree pstree extra pstree programbr pstree -a pstree -p pstree -pn pstree -g pstree -h

grep –help grep –version cat apple.txt   grep -c “apple” apple.txt grep -i “apPLe” apple.txt grep -l “apple” * grep -l “apple” abc.txt apple.txt grep -o “Apple” apple.txt grep -n “Apple” apple.txt grep -v “Apple” apple.txt grep “^Newton” apple.txt grep “bread.$” apple.txt  

pwd –help   pwd pwd -L pwd -P echo $PWD       pwd pwd -L pwd -P  

pr –help   pr –version cat abc.txt pr -3 abc.txt pr -d abc.txt pr -n abc.txt pr -t abc.txt seq 16 | pr -4t seq 16 | pr -4ts seq 16 | pr -4ts, seq 16 | pr -4ts’ : ‘ seq 16 | pr -4ts: seq 16 | pr -4ts, seq 16 | pr

bzip2 command in Linux/Unix The bzip2 command in Linux is used for compressing and decompressing files. It is like gzip command but takes a little more time to compress but compresses better. It uses the Burrows-Wheeler block-sorting text compression algorithm and Huffman coding. bzip2 command creates a compressed file with the extension “.bz2”. Syntax for

lsusb command in Linux allows users to display information about USB buses and devices connected to the system. This command is used to list connected USB device information including device name, vendor and product ID, speed, BUS class, device driver, etc. lsusb help To get help with lsusb command and options available for lsusb command,

sort command in Linux/Unix sort command in Linux allows users to sort the content of text files. sort command prints the result in standard output and users can also write standard output to a file. Syntax for sort command sort [option] [filename] To get help with sort command and display all options available with sort

stat –help   stat –version stat a.txt stat a.txt b.txt stat -t a.txt stat -f a.txt stat *.txt

split a.txt split b.txt split c.txt split -l 5 c.txt outputfile split c.txt -l 5 –verbose split -b 4 c.txt output_file_name split -l 5 -a 5 c.txt split -l 5 -d c.txt split -n 5 c.txt

The shred command overwrites the contents of files in a way that makes it very difficult to recover them. When you delete a file or delete it from the trash, from Linux or any other operating system, it is not completely erased from the hard drive. shred –help shred –version shred a.txt shred -n 10