🖥️sort

➡️This is a command-line reference manual for commands and command combinations that you don’t use often enough to remember it. This cheatsheet explains the sort command with important options and switches using examples.

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# To sort a file:
sort file

# To sort a file by keeping only unique:
sort -u file

# To sort a file and reverse the result:
sort -r file

# To sort a file randomly:
sort -R file

#==============================#
## CMD SORT 
##==============================##==============================#
sort +0d -1 +1n -2 file.txt
#

sort -c
# does not sort but checks whether a file is sorted, reporting first exception if not sorted.

sort -f
# Sort a file in case-insensitive order: sort -f. 'f' for 'fold,' i.e. fold upper and lower case together

sort -k 3
# sort a file based on the 3rd field in each line: sort -k 3. Fields separated by white space.

sort -k4 *.log |sed -n '/15\/Aug\/2015:14:11:02/,/20\/Aug\/2015:02:34:58/p' |cut -d" " -f1|sort|uniq|wc -l
# Count uniq hosts in time range.

sort -n
# Sort a file numerically

sort -u
# So common that most sort commands have a -u option to save you the trouble of piping to uniq

sort a file by the first column in dictionary order, then by the second column numerically.
# Multiple column sort

sort gkwzFruP.txt | awk '{if(l1==$1 && l3!=$3){print ll "\n" $0}; ll=$0;l1=$1;l3=$3}'
# Print dupes where the 3rd column changed. 

sort popular.txt | uniq -cd
# Right. You will want to sort the input to uniq first. 

sort -f. 'f' for 'fold,' i.e. fold upper and lower case together
# Sort a file in case-insensitive order

sort -t, -k5nr data.csv | less 
# Sort data.csv by the 5th column's numeric values in descending order.

sort -u roster1.txt roster2.txt | wc -l 
# Given two overlapping rosters of normalized names, count the total number of unique names across both rosters.

sort -g /var/log/nginx/access.log | awk '{print $1}' | uniq 
# Show all IPs that accesed your nginx server. 

sort -V ipv4addrs.txt
# In GNU sort, you can use -V (version sort) to also sort IPv4 addresses numerically according to each class.

sort -V ipv4addrs.txt 
# In GNU sort, you can use -V (version sort) to also sort IPv4 addresses numerically according to each octet. For IPv6, try using ipv6calc --addr2fulluncompaddr first to normalize the addresses and pass to a plain sort.

# Sort by IP address
sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4

# Sort two lists of names by the 2nd column (last name) so that you can compare the [hopefully] similar entries for matches. I just used this (after some normalizing) to make sure that I had a complete list of names in a document.
sort -k2 names1.txt names2.txt | less 

# sort list of email addresses by domain.tld email random list can be created here: https://www.randomlists.com/email-addresses 
sort -t@ -k2 emails.txt

# Sort and remove duplicate lines from two (or more files). Display only uniq lines from files.
sort file1 file2 | uniq -u
# Explanation: The -u flag of uniq removes duplicate lines from the input.
# Example file1:
	123456
	234567
	345678
# Example file2:
	234567
	345678
	456789
# Result:
	123456
	456789

#==============================##==============================#
## CMD SORT 
##==============================##==============================#

Cheatsheets are an excellent complement to other information sources like Linux man-pages, Linux help, or How-To’s and tutorials, as they provide compact and easily accessible information. While man-pages and detailed tutorials often contain comprehensive explanations and extensive guides, cheatsheets summarize the most important options forthe command sort in a clear format. This allows users to quickly access the needed information for sort without having to sift through lengthy texts. Especially in stressful situations or for recurring tasks, cheatsheets for sort are a valuable resource to work efficiently and purposefully.

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