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--- bash:cut [2019/12/12 21:15] – peter
+++ bash:cut [2021/01/26 15:57] (current) – removed peter
@@ Line 1: / Line 1: @@
-====== BASH - cut ======
-The **cut** command allows cutting of sections based on byte positions, characters, or fields separated by a delimiter like the ‘-‘ or ‘:’ characters.
-cut - remove sections from each line of files.
-**cut** can return section based on number of bytes (-b), characters (-c), or fields (-f) when fields are separated by a delimiter(-d).
-<WRAP info>
-Default delimiter is tab.
-</WRAP>
-----
-===== Character Cuts =====
-==== Cut a single character ====
-<code bash>
-cut -c 3
-abcdef
-</code>
-returns:
-<code bash>
-c
-</code>
-----
-==== Cut a range of characters ====
-A range must be provided in each case which consists of one of N, N-M, N-(N to last) or -M (first to M)
-<code bash>
-cut -c 2-4
-abcdef
-</code>
-Press CTRL+D to stop inputting
-returns:
-<code bash>
-bcd
-</code>
-----
-==== Cut a variety of characters ====
-<code bash>
-cut -c 2,4,7
-alongtext
-</code>
-returns:
-<code bash>
-lne
-</code>
-----
-==== Cut characters up to a specific position ====
-<code bash>
-cut -c -2
-abcdef
-</code>
-returns:
-<code bash>
-ab
-</code>
-----
-==== Cut characters from a specific position ====
-<code bash>
-cut -c 2-
-abcdef
-</code>
-returns:
-<code bash>
-bcdef
-</code>
-----
-==== Cut various characters ====
-<code bash>
-cut -c 1,6-9,16-
-alongtextwithnospaces
-</code>
-returns:
-<code bash>
-atextspaces
-</code>
-----
-===== Field Cuts =====
-==== Cut fields from a string, using a delimiter ====
-<code bash>
-cut -f 2- -d ':'
-:34:45:56
-</code>
-NOTE: -d specifies delimiter
-returns:
-<code bash>
-:45:56
-</code>
-----
-==== Cut fields from a string, without specifying a delimiter ====
-<code bash>
-cut -f 2
-er rt fg wd ji
-</code>
-returns:
-<code bash>
-er rt fg wd ji
-</code>
-NOTE: cut didn't find the delimiter (default is tab) so returns whole line.
-----
-==== Cut fields from a string, without specifying a delimiter; and prevent printing when delimiter not found ====
-<code bash>
-cut -f 2 -s
-er rt fg wd ji
-</code>
-NOTE: cut wont print as -s flag is used to prevent printing when delimiter not found.
-----
-==== Cut fields from a file, using a delimiter ====
-<code bash>
-cut -d: -f1 /etc/passwd >users.txt
-</code>