0
What else can I help you with?
What is the difference between grep and sed?
The major difference between SED GREP and AWK is that SED allows you to find a pattern address. AWK only allows you to find a numeric address.
What is the difference between sed and awk?
They both are frequently used programs in UNIX, but they do different things. Read their manuals if you want to use them.
What is the difference between the grep and sed commands in Linux?
The term "grep" stands for "global regular expression parser". It's used to search a character stream for items matching a specific pattern. The term "sed" stands for "stream editor". It's also capable of searching a character stream for items matching a pattern, but whereas grep just finds them, sed then actually does something to them to change them.
What is a filter in Unix?
A Unix filter is a command pattern that allows the output of one command to be "piped" into the input of the next command. Commands like 'ls' which list a directory are not filters since they only generate output. Filter examples are grep, sed, sort, uniq, awk. Commands in Unix are usually filters unless they only create output, like 'ls', 'vi', etc.
How do you locate lines beginning and ending with a dot using grep and sed commad?
grep can match the beginning of a line with the '^' character and the end of a line with the '$' character. Any character is matched by the '.' character, so to match a literal "." you will need to use the escaped '\.' sequence. Thus to match a line beginning with a dot and ending with a dot you would use:grep '^\..*\.$'This will match any line that both begins with a dot and ends with a dot, and has any characters in between.
What is an example shell script to print a certain range of lines of a file?
This can be done any number of ways in the Unix operating system. Using 'sed', you can use the address range to limit what you are printing, such as: sed -e '1,5p' < filename To just list lines 1 - 5 of a file, or the AWK or Perl scripting languages to do the same type of thing.
How do you convert a present tense to a past tense sentence by using shell script?
To convert a present tense sentence to past tense in a shell script, you can use tools like sed or awk to replace the verb forms. For example, you can use sed to replace "is" with "was" or "goes" with "went". Write a script that searches for specific present tense verbs and replaces them with their corresponding past tense forms.
What is shell equivalent for unirex N3?
The shell equivalent for UniRex N3, which is a popular multi-functional machine for various industrial applications, would typically involve using a combination of shell commands and scripts to automate similar tasks. For example, you could use commands like grep, awk, and sed to process text data, or cron jobs for scheduling tasks. Additionally, shell scripting can be employed to create workflows that mimic the functionalities of UniRex N3, depending on the specific use case. However, the exact equivalent would depend on the specific features and functions being compared.
Explain any five filters in UNIX system?
head - list beginning lines of a file tail - list ending lines of a file cut - eliminate columns of a file grep - find patterns of matches in files sed - make changes to selected lines in files
What does sed mean in English?
Sed is "thirst" Tener sed means "To be thirsty". For example: Tengo sed is 'I'm thirsty'.
Shell script that deletes all lines containing a specific word in one or more files?
Use the 'sed' command - it looks for a pattern and then you can 'delete' the line by preventing the input line from going to the output (sed is a filter program). For example, sed -e '/word/d' file1 file2 file3 > file.out will remove any line containing the word 'word' from the three files by not copying it to the output file 'file.out'
How do you locate lines beginning and ending with a dot using sed?
grep can match the beginning of a line with the '^' character and the end of a line with the '$' character. Any character is matched by the '.' character, so to match a literal "." you will need to use the escaped '\.' sequence. Thus to match a line beginning with a dot and ending with a dot you would use:
