From 21a13652df728c9571f899caf4949d5d46f49db7 Mon Sep 17 00:00:00 2001 From: johannst Date: Wed, 1 May 2024 17:39:45 +0000 Subject: deploy: 7ca41565c4e70b212cb88a4d18c18fa35768df6d --- cli/sed.html | 320 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 320 insertions(+) create mode 100644 cli/sed.html (limited to 'cli/sed.html') diff --git a/cli/sed.html b/cli/sed.html new file mode 100644 index 0000000..7475a46 --- /dev/null +++ b/cli/sed.html @@ -0,0 +1,320 @@ + + + + + + sed - Notes + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
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+

sed(1)

+
sed [opts] [script] [file]
+  opts:
+    -i          edit file in place
+    -i.bk       edit file in place and create backup file
+                (with .bk suffix, can be specified differently)
+    --follow-symlinks
+                follow symlinks when editing in place
+    -e SCRIPT   add SCRIPT to commands to be executed
+                (can be specified multiple times)
+    -f FILE     add content of FILE to command to be executed
+
+    --debug     annotate program execution
+
+

Examples

+

Delete lines

+
# Delete two lines.
+echo -e 'aa\nbb\ncc\ndd' | sed '1d;3d'
+# bb
+# dd
+
+# Delete last ($) line.
+echo -e 'aa\nbb\ncc\ndd' | sed '$d'
+# aa
+# bb
+# cc
+
+# Delete range of lines.
+echo -e 'aa\nbb\ncc\ndd' | sed '1,3d'
+# dd
+
+# Delete lines matching pattern.
+echo -e 'aa\nbb\ncc\ndd' | sed '/bb/d'
+# aa
+# cc
+# dd
+
+# Delete lines NOT matching pattern.
+echo -e 'aa\nbb\ncc\ndd' | sed '/bb/!d'
+# bb
+
+

Insert lines

+
# Insert before line.
+echo -e 'aa\nbb' | sed '2iABC'
+# aa
+# ABC
+# bb
+
+# Insert after line.
+echo -e 'aa\nbb' | sed '2aABC'
+# aa
+# bb
+# ABC
+
+# Replace line.
+echo -e 'aa\nbb' | sed '2cABC'
+# aa
+# ABC
+
+# Insert before pattern match.
+echo -e 'aa\nbb' | sed '/bb/i 123'
+# aa
+# 123
+# bb
+
+

Substitute lines

+
# Substitute by regex.
+echo -e 'aafooaa\ncc' | sed 's/foo/MOOSE/'
+# aaMOOSEaa
+# cc
+
+

Multiple scripts

+
echo -e 'foo\nbar' | sed -e 's/foo/FOO/' -e 's/FOO/BAR/'
+# BAR
+# bar
+
+ +
touch file
+ln -s file link
+ls -l link
+# lrwxrwxrwx 1 johannst johannst 4 Feb  7 23:02 link -> file
+
+sed -i --follow-symlinks '1iabc' link
+ls -l link
+# lrwxrwxrwx 1 johannst johannst 4 Feb  7 23:02 link -> file
+
+sed -i '1iabc' link
+ls -l link
+# -rw-r--r-- 1 johannst johannst 0 Feb  7 23:02 link
+
+ +
+ + +
+
+ + + +
+ + + + + + + + + + + + + + + + + + +
+ + -- cgit v1.2.3