Remove duplicate lines using awk $ awk '!($0 in array) { array[$0]; print }' temp Print all lines from /etc/passwd that has the same uid and gid $awk -F ':' '$3==$4' passwd.txt Print only specific field from a
The uniq command eliminates duplicate lines in a file.The sort command works on each line of a text file. Normally, it is used to order the contents of files containing data such as names, addresses, and phone numbers. In the following example, we use grep to search for index entries, ...
28Q) Write a command to duplicate each line in a file? Ans:sed 'p' < filename 29Q) Write a command to list the files in '/usr' directory that start with 'ch' and then display the number of lines in each file? Ans:wc -l /usr/ch* Another way is find /usr -name 'ch*' -...
Remove duplicate lines using awk $ awk '!($0 in array) { array[$0]; print }' temp Print all lines from /etc/passwd that has the same uid and gid $awk -F ':' '$3==$4' passwd.txt Print only specific field from a file. $ awk '{print $2,$5;}' employee.txt More awk examp...
Add line number for all non-empty-lines in a file $ sed '/./=' thegeekstuff.txt | sed 'N; s/\n/ /' More sed examples:Advanced Sed Substitution Examples 6. awk command examples Remove duplicate lines using awk $ awk '!($0 in array) { array[$0]; print }' temp ...
. filename [arguments] source filename [arguments] Read and execute commands from filename in the current shell environment and return the exit status of the last command executed from filename. If filename does not contain a slash, file names in PATH are used to find the directory containin...
Add line number for all non-empty-lines in a file $ sed '/./=' thegeekstuff.txt | sed 'N; s/\n/ /' More sed examples: Advanced Sed Substitution Examples 6. awk command examples Remove duplicate lines using awk $ awk '!($0 in array) { array[$0]; print }' temp Print...
Tutorial on using uniq, a UNIX and Linux command for reporting or filtering repeated lines in a file. Examples of showing a count of occurrences, showing only repeated lines and ignoring characters and specific fields.
If you are debugging a shell script, and you want to see what your script is doing, you can duplicate one of the important lines in your script and insert an "echo" in front of one of the duplicates. Doing this one or two times in a script isn't very difficult, but there are ...
Add line number for all non-empty-lines in a file $ sed '/./=' thegeekstuff.txt | sed 'N; s/\n/ /' More sed examples:Advanced Sed Substitution Examples 6. awk command examples Remove duplicate lines using awk $ awk '!($0 in array) { array[$0]; print }' temp ...