sed.md (630B)
1 # sed 2 3 print specific line number from file 4 ``` 5 sed 'n!d' file 6 ``` 7 8 add character 9 ``` 10 s/regex/&n/ 11 ``` 12 13 convert first word before equals symbol from lower to upper 14 _this is used in config files such as ifcfg to convert all variable names_ 15 ``` 16 :%s/^[[:alpha:]_]\{1,\}=/\U&/ 17 ``` 18 19 append line after match 20 ``` 21 sed '/match/a hello friend' filename 22 ``` 23 24 prepend line before match 25 ``` 26 sed '/match/i hello friend' filename 27 ``` 28 29 {upper,lower}case test 30 ``` 31 sed 's/[a-z].*=/\U&/' filename 32 ``` 33 _this example is for uppercasing var names in a rhel network config file_ 34 http://bigdatums.net/2017/09/30/how-to-uppercase-lowercase-text-with-sed/