Linux vi/vim replacement command instructions

: S/vivian/sky/Replace the first vivian in the current row with sky
: S/vivian/sky/g replace all vivian in the current row with sky
: N, $ s/vivian/sky/Replace the first vivian from row n to row n as sky
: N, $ s/vivian/sky/g replace all vivian values from row n to row n
N is a number. If n is., it indicates starting from the current row to the last row.

: % S/vivian/sky/(equivalent to: g/vivian/s // sky/) Replace the first vivian of each row with sky
: % S/vivian/sky/g (equivalent to: g/vivian/s // sky/g) replace all

You can use # As the separator. The/in the middle will not be used as the separator.
: S # vivian/# sky/# Replace the first vivian/in the current line with sky/
: % S +/oradata/apras/+/user01/apras1 + (replace with +/):/oradata/apras/Replace with/user01/apras1/

5. Delete ^ M from the text

Problem description: For line breaks, use the carriage return line break (0A0D) in the window, and the carriage return (0A) in linux. In this way, when you copy files on windows to unix, there will always be a ^ M. Please write a shell or c program that is used in unix to filter windows files (0D.

. Run the command: cat filename1 | tr-d "^ V ^ M"> newfile;
. Run the following command: sed-e "s/^ V ^ M //" filename> outputfilename. in methods 1 and 2, ^ V and ^ M indicate Ctrl + V and Ctrl + M. you must enter the file manually instead of pasting it.
. Processing in vi: first use vi to open the file, then press ESC, and then enter the command: % s/^ V ^ M //.
. : % S/^ M $/g

If the above method is useless, the correct solution is:

. Tr-d "\ r" <src> dest

. Tr-d "\ 015" dest

. Strings A> B

6. Others

Use the s command to replace strings. The specific usage includes:

: S/str1/str2/use string str2 to replace str1 that appears for the first time in the line

: S/str1/str2/g replace all the str1 strings in the row with str2

:., $ S/str1/str2/g replace string str1 with string str2 from the current row to the end of the body

: 1, $ s/str1/str2/g replace str1 with string str2

: G/str1/s // str2/g functions are the same as above

From the above replacement command, we can see that g is placed at the end of the command, which means to replace each appearance of the search string; without g, it means to only search
String is replaced for the first time. g is placed at the beginning of the command to replace all rows containing the search string in the body.