Usage of sed in linux (addition and deletion of row data), linuxsed

Usage of sed in linux (addition and deletion of row data), linuxsed

Sed syntax
[Root @ fwq test] # sed -- help
Usage: sed [Option]... {script (if no other script exists)} [input file]...

-N, -- quiet, -- silent cancel Automatic print mode space
-E script, -- expression = Add "script" to the program running list
-F script file, -- file = script file: Add "script file" to the program running list
-- Follow-symlinks follow symlinks when processing in place; hard links will still be broken.
-I [SUFFIX], -- in-place [= SUFFIX]
Edit files in place (makes backup if extension supplied ).
The default operation mode is to break symbolic and hard links.
This can be changed with -- follow-symlinks and -- copy.
-C, -- copy
Use copy instead of rename when shuffling files in-I mode.
While this will avoid breaking links (symbolic or hard),
Resulting editing operation is not atomic. This is rarely
The desired mode; -- follow-symlinks is usually enough, and
It is both faster and more secure.
-L N, -- line-length = N specifies the expected length of line feed for the "l" command.
-- Posix: Disable all GNU extensions
-R, -- regexp-extended use an extended regular expression in the script
-S, -- separate treats the input file as an independent file rather than a long continuous input
-U, -- unbuffered reads the least data from the input file and refreshes the output more frequently.
-- Help print help and exit
-- Version: Output version information and exit

 

 

Print the travel number and delete 2-5 rows

[Root @ fwq test] # nl/etc/passwd | sed '2, 5d '| more
 1 root: x: 0: 0: root, 704,03738888766, 03738888766:/root:/bin/bash
6 sync: x: 5: 0: sync:/sbin:/bin/sync
7 shutdown: x: 6: 0: shutdown:/sbin/shutdown
8 halt: x: 7: 0: halt:/sbin/halt
9 mail: x: 8: 12: mail:/var/spool/mail:/sbin/nologin
10 uucp: x: 10: 14: uucp:/var/spool/uucp:/sbin/nologin

Print the travel number and delete only 2-5 rows

[Root @ fwq test] # nl/etc/passwd | sed '2d '| more
1 root: x: 0: 0: root, 704,03738888766, 03738888766:/root:/bin/bash
3 daemon: x: 2: 2: daemon:/sbin/nologin
4 adm: x: 3: 4: adm:/var/adm:/sbin/nologin
5 lp: x: 4: 7: lp:/var/spool/lpd:/sbin/nologin

Print the travel number and delete all content after line 1

[Root @ fwq test] # nl/etc/passwd | sed '2, $ d'
1 root: x: 0: 0: root, 704,03738888766, 03738888766:/root:/bin/bash
[Root @ fwq test] #

Print the travel number and add "drink tea" to the end of row 2nd"

[Root @ fwq test] # nl/etc/passwd | sed '2a drink tea '| more
1 root: x: 0: 0: root, 704,03738888766, 03738888766:/root:/bin/bash
2 bin: x: 1: 1: bin:/sbin/nologin
Drink tea
3 daemon: x: 2: 2: daemon:/sbin/nologin
4 adm: x: 3: 4: adm:/var/adm:/sbin/nologin

Print the travel number and add two lines of "drink tea or drink beer"

[Root @ fwq test] # nl/etc/passwd | sed '2a drink tea or ...\
Drink beer? '| More
1 root: x: 0: 0: root, 704,03738888766, 03738888766:/root:/bin/bash
2 bin: x: 1: 1: bin:/sbin/nologin
Drink tea or...
Drink beer?
3 daemon: x: 2: 2: daemon:/sbin/nologin
4 adm: x: 3: 4: adm:/var/adm:/sbin/nologin

Print the travel number and replace the content in line 2-5 with "No 2-5"

[Root @ fwq test] # nl/etc/passwd | sed '2, 5c No 2-5 number' | more
1 root: x: 0: 0: root, 704,03738888766, 03738888766:/root:/bin/bash
No 2-5 number
6 sync: x: 5: 0: sync:/sbin:/bin/sync
7 shutdown: x: 6: 0: shutdown:/sbin/shutdown
8 halt: x: 7: 0: halt:/sbin/halt

Print the travel number and only list the content in line 5-7

[Root @ fwq test] # nl/etc/passwd | sed-n'5, 7p'
5 lp: x: 4: 7: lp:/var/spool/lpd:/sbin/nologin
6 sync: x: 5: 0: sync:/sbin:/bin/sync
7 shutdown: x: 6: 0: shutdown:/sbin/shutdown

 

(Urgent) in LINUX, use sed to delete a specified row. The starting position of the specified row is obtained through parameters. How can I delete the end position of the file?

Sed $ I ', $ d' input

I is a shell variable. It must be obtained outside the sed scope (that is, outside single quotes) to be correctly parsed. Or, in a simpler way, change single quotes to double quotation marks.
In addition, if you want to directly modify the file, you need to use the sed-I option, that is, sed-I $ I ', $ d' input

For the linux sed command, delete multiple lines. One line contains two keywords and the other contains two keywords.

I can't figure out how to write a sentence with sed. You have written a script to implement the functions you want.
If you are sure that <package 10014 to/package> is 5 rows.

#! /Bin/bash
Filename = file
LINES = 'grep-n' sharedUserId = "10014" '$ filename | wc-l'
While [[$ LINES-ne 0]
Do
STARTnum = ('grep-n' sharedUserId = "10014" '$ filename | awk-F ":"' {print $1 }'')
For I in $ {STARTnum [0]}
Do
J = 'expr $ I + 4'
Sed-I ''$ I ',' $ jd' file
Done
(LINES --))
Done
#######################
Try sed-I '/^ <package. * 10014/,/^ <\/package/d'