Linux command: tr - translate or delete characters

tr - translate or delete characters

-s : squeeze
-d : delete
-t : translate

Example file: files.txt

$ file files.txt
files.txt: ASCII text, with CRLF line terminators
$ cat file
8V2L
bny0
c4ZX
D8B3
FHl1
oiMO
PFbD
rmfX
SRSq
uqyw
v2Vb
X1Uy

Combine lines

$ tr -s '\r\n' ' ' < files.txt
8V2L bny0 c4ZX D8B3 FHl1 oiMO PFbD rmfX SRSq uqyw v2Vb X1Uy $

Delete new line characters

$ tr -d '\n' < inputfile.txt > outputfile.txt

Practice

>>> THM | Linux Modules - Task 5

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printenv - print all or part of environment NAME printenv - print all or part of environment SYNOPSIS printenv [OPTION]... [VARIABLE]... DESCRIPTION Print the values of the specified environment VARIABLE(s). If no VARIABLE is speci‐ fied, print name and value pairs for them all. -0, --null end each output line with NUL, not newline --help display this help and exit --version output version information and exit NOTE: your shell may have its own version of printenv, which usually supersedes the version described here. Please refer to your shell's documentation for d...

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